Vascular Plants of Oregon
Asteraceae
Asteraceae
Generated from PNW Herbaria database
November 28, 2020.
188 genus names
1,044 species/infraspecies names
(names highlighted in brown could not be resolved to an accepted name)
Index to Genera:
A: Acanthospermum, Achillea, Achyrachaena, Acmella, Adenocaulon, Adoseris, Ageratina, Agoseris, Ambrosia, Anaphalis, Ancistrocarphus, Anisocarpus, Antennaria, Anthemis, Aplopappus, Arctium, Arctotheca, Arnica, Artemisia, Askellia, Aster
B: Baccharis, Balsamorhiza, Bellis, Berkheya, Bidens, Blepharipappus, Blepharopappus, Boltonia, Brickellia
C: Cacaliopsis, Calais, Calendula, Calycadenia, Canadanthus, Carduus, Carthamus, Centaurea, Centromadia, Chaenactis, Chaetadelpha, Chamaemelum, Chondrilla, Chrysanthemum, Chrysothamnus, Cichorium, Cirsium, Cladanthus, Cnicus, Columbiadoria, Conyza, Conzya, Coreopsis, Corethrogyne, Cosmos, Cota, Cotula, Crepis, Crocidium, Crupina, Cychlachaena, Cyclachaena
E: Eatonella, Eclipta, Erechtites, Ericameria, Erigeron, Eriophyllum, Eucephalus, Euchiton, Eupatorium, Eurybia, Euthamia
G: Gaertneria, Gaillardia, Galinsoga, Gamochaeta, Gamocheta, Glebionis, Glyptopleura, Gnaphalium, Grindelia, Gutierrezia
H: Haplopappus, Hazardia, Helenium, Helianthella, Helianthus, Helichrysum, Heliopsis, Helminthotheca, Hemizonella, Hemizonia, Hesperevax, Heterotheca, Hieracium, Homopappus, Hoorebekia, Hulsea, Hymenopappus, Hymenoxys, Hypochaeris
L: Lactuca, Lagophylla, Lapsana, Lapsanastrum, Lasthenia, Layia, Leontodom, Leontodon, Lessingia, Leucanthemum, Liatris, Logfia, Luina, Lygodesmia
P: Packera, Petasites, Pleiacanthus, Prenanthella, Psathyrotes, Pseudognaphalium, Psilocarphus, Ptilonella, Ptilophora, Ptiloria, Pyrrocoma
S: Saussurea, Scorzonella, Senecio, Sericocarpus, Sigesbeckia, Silybum, Solidago, Soliva, Sonchus, Stenotus, Stephanomeria, Stylocline, Symphyotrichum
T: Tanacetum, Taraxacum, Tetradymia, Thelesperma, Tonestus, Townsendia, Tragopogon, Tripleurospermum, Troximon, Tussilago
U: Uropappus
V: Vesicarpa
W: Wyethia
X: Xanthium,
Acanthospermum hispidum (WS, WTU; 2; 1900)
Achillea filipendulina (ID, OSC, SRP; 5; 2012)
Achillea millefolium (BLMMD, BOIS, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDE, IDS, LEA, LINF, MONT, NY, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 714; 1880-2019)
Achillea ptarmica (HOYT, HPSU, IDE, OSC, WTU; 6; 1969-2015)
Achyrachaena mollis (HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 43; 1882-2012)
Acmella repens (WS; 1; 1914)
Adenocaulon bicolor (BLMMD, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, OSC, PSM, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 214; 1871-2018)
Adoseris aurantiaca (LEA; 1; 1957)
Ageratina occidentalis (BLMMD, CIC, HPSU, HSC, ID, OSC, SOC, SRP, UBC, VALE, WS, WSTC, WTU; 204; 1882-2014)
Agoseris ×agrestis (OSC, SRP, VALE, WTU; 5; 1961-2002)
Agoseris apargioides (NY, OSC, SOC, WS, WTU; 44; 1882-1997)
var. maritima (NY, OSC, SOC, WS, WTU; 40; 1882-1997)
Agoseris aurantiaca (CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, OSC, RM, SOC, SRP, UBC, WS, WTU; 273; 1887-2018)
var. aurantiaca (CIC, HJAEF, HPSU, ID, IDS, OSC, RM, SOC, SRP, UBC, WS, WTU; 215; 1887-2018)
var. purpurea (WTU; 3; 1925-2018)
Agoseris ×elata (HPSU, NY, OSC, SOC, WTU; 20; 1927-2008)
Agoseris glauca (BOIS, CIC, HPSU, HSC, ID, IDS, MONT, NY, OSC, PSM, RM, SOC, SRP, VALE, WCW, WS, WTU, WWB; 168; 1884-2019)
var. dasycephala (CIC, OSC, RM, WS, WTU, WWB; 31; 1884-2007)
var. glauca (BOIS, CIC, HPSU, HSC, ID, IDS, OSC, RM, SOC, SRP, VALE, WS, WTU; 97; 1894-2019)
var. scorzonerifolia (WTU; 1; 1920)
Agoseris gracilenta (WTU; 2; 1916-1927)
Agoseris gracilina (SRP; 1; 1920)
Agoseris gracillens (WS; 1; 1933)
Agoseris grandiflora (BOIS, CIC, HJAEF, HPSU, HSC, ID, IDE, MONT, OSC, RM, SOC, SRP, WS, WTU; 241; 1880-2019)
var. grandiflora (OSC, SOC, WTU; 62; 1884-2010)
var. leptophylla (OSC, SOC, WTU; 109; 1882-2019)
Agoseris heterophylla (BABY, BLMVL, CIC, HJAEFB, HPSU, HSC, ID, LINF, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU; 288; 1876-2018)
var. cryptopleura (WTU; 1; 1932)
var. heterophylla (CIC, HPSU, ID, OSC, RM, SOC, SRP, UBC, WS, WTU; 207; 1876-2015)
Agoseris hirsuta (WTU; 1; 1919)
Agoseris monticola (CIC, HPSU, ID, OSC, SOC, WS, WTU; 70; 1885-2019)
Agoseris nutans (IDE; 1; 1938)
Agoseris parviflora (CIC, ID, MONT, NY, OSC, SOC, SRP, VALE, WS, WTU; 125; 1885-2010)
Agoseris retrorsa (CIC, HPSU, ID, OSC, RM, SOC, UBC, VALE, WS, WTU; 57; 1882-2018)
Agoseris taraxifolia (WTU; 3; 1925-1935)
Ambrosia acanthicarpa (CIC, HPSU, ID, IDE, OSC, SRP, WS, WTU; 42; 1887-2019)
Ambrosia artemisiifolia (CIC, HPSU, ID, IDE, OSC, SOC, UBC, VALE, WS, WTU; 69; 1901-2018)
Ambrosia chamissonis (HPSU, ID, MONT, OSC, PSM, REED, SOC, SRP, WCW, WS, WTU; 94; 1882-2019)
Ambrosia grayi (OSC; 4; 2008)
Ambrosia psilostachya (ID, OSC, SRP, UAAH, UBC, WS, WTU; 20; 1911-2015)
Ambrosia trifida (IDE, OSC, WS, WTU; 9; 1910-2007)
Anaphalis margaritacea (BLMMD, BLMVL, CIC, EWU, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, MONT, NY, OSC, PSM, REED, RM, SOC, SRP, UBC, WCW, WS, WSTC, WTU; 424; 1880-2019)
Anaphalis sierrae (WTU; 2; 1916-1918)
Anaphalis subalpina (WTU; 1; 1918)
Ancistrocarphus filagineus (CIC, IDS, NY, OSC, SRP, UBC, VALE, WS, WTU; 55; 1880-2009)
Anisocarpus madioides (BLMMD, HJAEF, HJAEFB, HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 137; 1871-2016)
Antennaria anaphaloides (CIC, ID, IDS, OSC, RM, SOC, SRP, WS, WTU; 75; 1885-2018)
Antennaria arcuata (HPSU; 2; 1973)
Antennaria argentea (BLMMD, CIC, EWU, HPSU, ID, IDS, OSC, SOC, SRP, UBC, WS, WTU; 129; 1887-2017)
Antennaria corymbosa (CIC, OSC, VALE, WCW, WS, WTU; 33; 1901-2002)
Antennaria dimorpha (BLMMD, BLMVL, CIC, HPSU, ID, IDS, LINF, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 180; 1882-2010)
Antennaria flagellaris (BBLM, BLMVL, CIC, ID, OSC, RM, SRP, VALE, WS, WTU; 33; 1885-2011)
Antennaria geyeri (HPSU, ID, IDS, MONT, OSC, REED, SOC, SRP, UBC, WS, WTU; 96; 1881-2009)
Antennaria howellii (HPSU, OSC, REED, RM, SOC, UBC, WS, WTU; 82; 1877-2017)
ssp. howellii (HPSU, OSC, RM, SOC, WS, WTU; 29; 1882-2010)
ssp. neodioica (HPSU, OSC, RM, WS, WTU; 46; 1889-2017)
Antennaria lanata (HPSU, ID, OSC, SRP, WS, WTU; 53; 1899-2002)
Antennaria luzuloides (BLMMD, BLMVL, BOIS, CIC, HPSU, ID, IDS, MONT, OSC, PSM, REED, RM, SOC, SRP, VALE, WCW, WS, WTU; 279; 1882-2018)
ssp. aberrans (OSC, REED, WTU; 10; 1927-2018)
ssp. luzuloides (CIC, HPSU, ID, OSC, SOC, SRP, VALE, WTU; 112; 1882-2017)
Antennaria media (CIC, HPSU, ID, MONT, OSC, REED, SOC, SRP, WCW, WS, WTU; 145; 1881-2018)
Antennaria microphylla (BLMVL, BOIS, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDE, IDS, LEA, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 491; 1827-2018)
Antennaria neglecta (HPSU, ID, NY, RM, WS, WTU; 8; 1887-2001)
Antennaria parvifolia (ID; 1; 1949)
Antennaria plantaginifolia (LINF; 1; 1890)
Antennaria pulcherrima (IDS, WS, WTU; 4; 1925-1972)
Antennaria racemosa (BLMVL, CIC, HJAEF, HJAEFB, HPSU, ID, NY, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 155; 1879-2018)
Antennaria rosea (WTU; 1; 2004)
var. rosea (WTU; 1; 2004)
Antennaria sieboldiana (WS; 1; 1960)
ssp. pinnatisecta (WS; 1; 1960)
Antennaria stenophylla (BLMVL, CIC, HPSU, ID, OSC, PSM, RM, SOC, SRP, VALE, WS, WTU; 71; 1882-2018)
Antennaria suffrutescens (BLMMD, HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 40; 1884-2004)
Antennaria umbrinella (CIC, EWU, HPSU, ID, OSC, REED, RM, SOC, SRP, WS, WTU; 47; 1881-2012)
Anthemis altissima (WS, WTU; 5; 1912)
Anthemis arvensis (CIC, HPSU, ID, LINF, OSC, SOC, WCW, WS, WTU; 32; 1896-2010)
Anthemis cotula (HJAEF, HPSU, HSC, ID, IDS, LEA, OSC, REED, SOC, UBC, USFS, WCW, WS, WTU; 137; 1883-2019)
Aplopappus acaulis (WTU; 3; 1927-1935)
Aplopappus bloomeri (WTU; 1; 1934)
Aplopappus curvatus (WTU; 1; 1925)
Aplopappus hirtus (WTU; 1; 1929)
Aplopappus howellii (WTU; 1; 1885)
Aplopappus lanuginosus (WTU; 2; 1885-1908)
Aplopappus stenophyllus (WTU; 1; 1935)
Arctium lappa (MONT, OSC, SOC, SRP, WS, WTU; 7; 1918-1962)
Arctium minus (CIC, HPSU, ID, MONT, OSC, REED, SOC, SRP, WCW, WS, WTU; 38; 1881-2010)
Arctium tomentosum (OSC; 3; 1918-1956)
Arctotheca calendula (OSC; 2; 2011-2015)
Arnica alpina (HPSU; 1; 1975)
Arnica aurantiaca (NY, OSC, REED, RM, WS; 5; 1900-1910)
Arnica cana (REED; 1; 1920)
Arnica cernua (BLMMD, HPSU, HSC, ID, LINF, OSC, SOC, SRP, UBC, WS, WTU; 91; 1884-2011)
Arnica chamissonis (CIC, EWU, HPSU, ID, IDS, MONT, OSC, RM, SOC, SRP, VALE, WS, WTU, WWB; 218; 1885-2018)
Arnica cordata (CIC; 1; 2007)
Arnica cordifolia (BLMMD, BLMVL, CIC, HPSU, HSC, ID, IDS, LEA, LINF, MONT, OSC, REED, RM, SOC, SRP, UBC, WCW, WS, WTU, WWB; 457; 1880-2018)
Arnica cordifolia × Arnica latifolia (WS; 3; 1914-1949)
Arnica discoidea (CIC, DPP, HJAEFB, HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 82; 1884-2018)
Arnica eriopoda (NY; 1; 1902)
Arnica fulgens (CIC, HPSU, OSC, RM, SOC, WS, WTU; 22; 1897-2014)
Arnica glabrata (NY; 1; 1898)
Arnica gracilis (OSC, RM, WS, WTU; 18; 1898-2002)
Arnica lanceolata (HPSU, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, WS, WTU; 127; 1880-2019)
ssp. prima (HPSU, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, WS, WTU; 127; 1880-2019)
Arnica latifolia (BLMMD, CIC, EWU, HJAEF, HJAEFB, HPSU, ID, OSC, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 227; 1871-2018)
Arnica longifolia (CIC, HPSU, ID, IDS, LEA, MONT, OSC, SOC, SRP, UBC, V, WS, WTU, WWB; 120; 1896-2018)
ssp. longifolia (WS; 1; 1985)
Arnica membranacea (NY; 1; 1892)
Arnica mollis (BLMVL, CIC, HPSU, HSC, ID, IDS, OSC, REED, RM, SOC, SRP, WS, WTU; 224; 1884-2018)
ssp. genuina (WTU; 8; 1908-1935)
var. mollis (WTU; 1; 1946)
Arnica nevadensis (BLMMD, HSC, ID, OSC, WS, WTU; 42; 1896-2014)
Arnica ovata (IDS, OSC, SOC, WS, WTU; 43; 1897-2000)
Arnica parryi (CIC, HJAEF, HPSU, ID, IDS, MONT, OSC, SOC, SRP, WS, WTU; 57; 1882-2017)
Arnica platyphylla (RM; 1; 1896)
Arnica rivularis (WS; 1; 1897)
Arnica rydbergii (CIC, HPSU, ID, IDS, OSC, REED, SRP, WCW, WS, WTU; 36; 1910-2019)
Arnica sororia (BLMVL, CIC, HPSU, ID, IDS, MONT, NY, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 146; 1885-2018)
Arnica spathulata (HPSU, HSC, ID, NY, OSC, SOC, UBC, WS, WTU; 79; 1887-2006)
ssp. genuina (WTU; 1; 1950)
Arnica viscosa (ID, OSC, SOC, UBC, WS, WTU; 10; 1950-1996)
Artemisia abrotanum (OSC, WS; 3; 1915-1951)
Artemisia absinthium (HPSU, OSC, SOC, WS, WTU; 16; 1909-2018)
Artemisia albicans (CIC, OSC, WS; 5; 1885-1954)
Artemisia annua (SRP, WS, WTU; 6; 1899-1989)
Artemisia arbuscula (BBLM, BBLM-OWY, BLMVL, BOIS, CIC, HPSU, ID, LINF, MONT, OSC, PSM, RM, SOC, SRP, UBC, VALE, WS, WTU; 202; 1886-2019)
ssp. arbuscula (CIC, HPSU, ID, OSC, SOC, SRP, UBC, VALE, WS, WTU; 117; 1886-2015)
ssp. longicaulis (BOIS, OSC, VALE; 13; 1894-2004)
ssp. longiloba (BBLM, BBLM-OWY, CIC, ID, OSC, RM, VALE; 33; 1901-2019)
ssp. thermopola (CIC, OSC, SRP; 9; 1950-2009)
Artemisia arbusculus (LEA; 1; 1956)
Artemisia biennis (CIC, HPSU, OSC, SOC, WS; 26; 1884-1990)
Artemisia borealis (WS; 3; 1886-1955)
var. wormskioldii (WS; 3; 1886-1955)
Artemisia campestris (CIC, ID, MONT, NY, OSC, SRP, WTU; 23; 1882-2018)
var. borealis (ID, SRP; 2; 1938-2002)
var. scouleriana (NY, OSC, SRP, WTU; 6; 1910-2018)
var. wormskioldii (MONT, OSC, WTU; 14; 1882-1955)
Artemisia cana (BBLM-OWY, CIC, HPSU, ID, MONT, OSC, PSM, RM, SOC, SRP, VALE, WS, WTU; 95; 1894-2015)
ssp. bolanderi (CIC, HPSU, MONT, OSC, SOC, SRP, VALE, WTU; 54; 1894-2015)
ssp. cana (RM, VALE; 2; 2002-2007)
ssp. viscidula (CIC, ID, SRP, VALE, WS; 12; 1894-2010)
Artemisia douglasiana (CIC, HPSU, ID, OSC, PSM, REED, RM, SOC, SRP, UBC, WS, WTU; 134; 1875-2018)
Artemisia dracunculus (CIC, HPSU, IDS, OSC, SRP, UBC, VALE, WCW, WS, WTU; 57; 1887-2019)
Artemisia estesii (OSC, WTU; 31; 1894-2007)
Artemisia furcata (ID; 3; 1947)
Artemisia littoricola (WTU; 1; 1884)
Artemisia ludoviciana (BBLM-OWY, BOIS, CIC, EWU, HJAEF, HPSU, ID, IDS, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 458; 1880-2018)
ssp. candicans (BOIS, CIC, HJAEF, HPSU, ID, IDS, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 178; 1880-2017)
ssp. estesii (OSC; 8; 1977-1991)
ssp. incompta (BBLM-OWY, CIC, ID, OSC, SRP, VALE, WTU; 100; 1894-2013)
Artemisia ludoviciana ssp. incompta × Artemisia michauxiana (CIC; 1; 1995)
ssp. lindleyana (HPSU, OSC, SRP, UBC, WS; 44; 1885-2002)
ssp. ludoviciana (CIC, EWU, HPSU, ID, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 92; 1880-2012)
Artemisia michauxiana (CIC, HPSU, OSC, SRP, WS, WTU; 46; 1898-2018)
Artemisia nova (BOIS, CIC, OSC, VALE; 19; 1937-2009)
Artemisia packardiae (BBLM, BLMVL, CIC, ID, IDS, NY, OSC, VALE, WTU; 61; 1957-2009)
Artemisia papposa (BBLM, BBLM-OWY, BLMVL, BOIS, CIC, ID, MONT, OSC, SRP, VALE, WS; 57; 1976-2009)
Artemisia potentilloides (CIC, IDS, OSC, SOC, SRP, WS, WTU; 37; 1885-2004)
var. potentilloides (IDS, OSC, SOC, SRP, WS, WTU; 35; 1885-2004)
Artemisia pycnocephala (OSC; 3; 1924-2010)
Artemisia rigida (BOIS, CIC, ID, MONT, OSC, RM, SRP, UBC, VALE, WS, WTU; 80; 1894-2014)
Artemisia rothrockii (WS; 1; 1949)
Artemisia scoparia (WS; 2; 1900-1910)
Artemisia serrata (WS; 1; 1900)
Artemisia spiciformis (HPSU; 1; 1975)
Artemisia spinescens (CIC, HPSU, ID, LINF, OSC, PSM, VALE, WS, WTU; 78; 1885-2020)
Artemisia suksdorfii (HPSU, ID, IDS, OSC, REED, SRP, UBC, WS, WTU; 55; 1883-2014)
Artemisia tilesii (LINF, OSC, UBC, WS, WTU; 7; 1896-1989)
Artemisia tridentata (BBLM, BBLM-OWY, BOIS, CIC, EWU, HPSU, ID, IDS, LINF, MONT, OSC, PSM, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 335; 1893-2018)
ssp. tridentata (CIC, ID, MONT, OSC, RM, SOC, UBC, VALE, WS, WTU; 151; 1893-2018)
ssp. vaseyana (BBLM, BBLM-OWY, CIC, ID, MONT, OSC, RM, SOC, SRP, VALE, WS, WTU; 77; 1900-2018)
ssp. wyomingensis (BBLM, CIC, OSC, SRP, UBC, VALE, WTU; 25; 1924-2009)
Artemisia tripartita (BLMVL, CIC, ID, MONT, OSC, VALE, WS; 45; 1882-2008)
ssp. tripartita (CIC, OSC, VALE, WS; 29; 1882-2003)
Artemisia vulgaris (HPSU, OSC, RM, SOC, WS, WTU; 33; 1900-2013)
var. gnaphalodes (WTU; 1; 1928)
Askellia pygmaea (ID, OSC, SRP, WTU; 15; 1931-2004)
Aster alpinus (WCW; 1; 1929)
Aster ascendens × Aster chilensis (WTU; 1; 1935)
Aster ascendens × Aster eatonii (WTU; 3; 1887-1918)
Aster ascendens × Aster laevis (WTU; 1; 1907)
Aster cusickii (VALE; 1; ?)
var. cusickii (VALE; 1; ?)
Aster delectus (NY, RM, WS; 3; 1901)
Aster denudatus (REED; 1; 1910)
Aster eatoni × Aster foliaceus (WTU; 1; 1949)
Aster eatonii × Aster foliaceus (WTU; 1; 1949)
Aster eatonii × Aster foliaceus var. parryi (WTU; 1; 1957)
Aster eatonii × Aster occidentalis (WTU; 3; 1931-1934)
Aster foliaceus (WTU; 6; 1910-1959)
ssp. apricus (WTU; 1; 1959)
ssp. foliaceus (WTU; 1; 1936)
ssp. parryi (WTU; 4; 1910-1956)
Aster foliaceus × Aster occidentalis (WTU; 1; 1949)
Aster foliaceus × Aster occidentalis var. fremontii (WTU; 1; 1910)
Aster glabratus (ID, SRP, WTU; 9; 1946-1949)
Aster hallii × Aster occidentalis (WTU; 1; 1917)
Aster humistratus (COLO, NY, WS; 4; 1905)
Aster intermedius (WTU; 2; 1919-1935)
Aster militaris (NY; 1; 1893)
Aster mucronatus (NY, WS; 2; 1902)
Aster occidentalis (OSC; 2; 1901)
ssp. intermedius (OSC; 2; 1901)
Aster oreganus (WTU; 1; 1889)
Aster oregonus (ID, MONT; 2; 1917-1949)
Aster pumicola (NY; 1; 1894)
Aster umbraticus (NY; 1; 1902)
Aster vaccinus (NY, RM, WS; 5; 1901)
Baccharis douglasii (WTU; 2; 1944-1999)
Baccharis pilularis (BLMMD, CIC, HPSU, ID, IDS, OSC, PSM, REED, SOC, SRP, UBC, WS, WTU; 109; 1881-2017)
ssp. consanguinea (ID, OSC, REED, SOC, WTU; 73; 1881-2017)
Baccharis salicifolia (OSC; 7; 1912-1999)
Balsamorhiza careyana (HPSU, ID, NY, OSC, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 133; 1880-2017)
Balsamorhiza careyana × Balsamorhiza deltoidea (WS, WTU; 4; 1920-1942)
Balsamorhiza careyana × Balsamorhiza serrata (WS; 9; 1950)
Balsamorhiza deltoidea (EWU, HPSU, HSC, ID, LINF, OSC, SOC, UBC, WCW, WS, WTU; 146; 1884-2019)
Balsamorhiza deltoidea × Balsamorhiza platylepis (WS; 3; 1942-1949)
Balsamorhiza deltoidea × Balsamorhiza sericea (SOC; 4; 1955-1960)
Balsamorhiza hirsuta × Balsamorhiza sagittata (WS; 1; 1942)
Balsamorhiza hispidula (CIC, ID, OSC, VALE, WS, WTU; 20; 1896-2003)
Balsamorhiza hookeri (BLMVL, BOIS, CIC, HPSU, ID, LINF, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 113; 1886-2015)
Balsamorhiza hookeri var. hispidula × Balsamorhiza sagittata (WTU; 2; 1946)
Balsamorhiza incana (BLMMD, BLMVL, HPSU, ID, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 66; 1926-2018)
Balsamorhiza incana × Balsamorhiza sagittata (WS; 3; 1942)
Balsamorhiza incana × Balsamorhiza serrata (WTU; 1; 1945)
Balsamorhiza lanata (OSC, SOC; 3; 2000-2001)
Balsamorhiza macrophylla (HPSU, OSC; 2; 1950-1975)
Balsamorhiza rosea (OSC, WTU; 2; 1995)
Balsamorhiza sagittata (BOIS, CIC, HPSU, ID, LINF, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 239; 1889-2019)
Balsamorhiza sericea (BLMMD, COLO, HPSU, HSC, LINF, OSC, SOC, UBC, WS, WTU; 44; 1887-2011)
Balsamorhiza serrata (CIC, HPSU, ID, IDS, LINF, NY, OSC, RM, SOC, SRP, UBC, WCW, WS, WTU; 158; 1885-2017)
Balsamorhiza ×terebinthacea (OSC; 1; 1931)
Balsamorhiza ×tomentosa (OSC; 2; 1930)
Bellis perennis (CIC, EWU, HPSU, ID, IDS, LINF, OSC, REED, SOC, SRP, UBC, USFS, WS, WTU; 96; 1902-2017)
Berkheya heterophylla (WS; 3; 1902-1903)
Bidens beckii (HPSU, OSC; 5; 1931-2005)
Bidens cernua (BLMVL, CIC, HPSU, ID, IDS, MONT, OSC, PSM, RM, SOC, SRP, UBC, USFS, VALE, WS, WTU; 161; 1883-2019)
Bidens connata (UBC, WTU; 7; 1999-2011)
Bidens cusickii (WS; 1; 1897)
Bidens frondosa (CIC, HPSU, HSC, ID, OSC, REED, SOC, SRP, UBC, VALE, WS, WTU; 83; 1893-2020)
Bidens tripartita (HPSU, OSC, UBC, WS, WTU; 17; 1887-2011)
Bidens vulgata (HPSU, OSC, SOC, WS, WTU; 29; 1880-2004)
Blepharipappus laevis (WTU; 3; 1887-1923)
Blepharipappus scaber (BBLM-OWY, BLMMD, BOIS, CIC, EWU, HPSU, HSC, ID, IDS, LEA, LINF, MONT, OSC, RM, SOC, SRP, UBC, V, VALE, WCW, WS, WTU, WWB; 412; 1881-2019)
Blepharopappus scaber (WS; 2; 1998)
Boltonia asteroides (HPSU, OSC, WS; 13; 1897-2005)
var. recognita (OSC; 8; 1910-1982)
Boltonia decurrens (ID; 1; 2007)
Brickellia calfornica (SRP; 1; 2015)
Brickellia californica (CIC, HSC, ID, OSC, PSM, VALE, WTU; 36; 1887-2015)
Brickellia grandiflora (CIC, HPSU, IDS, MONT, OSC, RM, SOC, VALE, WCW, WS, WTU; 48; 1886-2012)
Brickellia greenei (OSC, SOC, UBC, WS, WTU; 18; 1887-2011)
Brickellia microphylla (CIC, HPSU, ID, OSC, SRP, VALE, WS, WTU; 32; 1897-2017)
var. microphylla (CIC, OSC, VALE, WS, WTU; 18; 1897-2017)
Brickellia oblongifolia (CIC, IDE, IDS, OSC, SOC, SRP, UBC, VALE, WS, WTU; 74; 1882-2002)
var. linifolia (CIC, OSC, SOC, VALE, WTU; 10; 1928-2002)
var. oblongifolia (CIC, OSC, VALE, WS, WTU; 49; 1882-2002)
Cacaliopsis nardosmia (BLMMD, HPSU, HSC, ID, IDS, OSC, SOC, SRP, UBC, WS, WTU; 122; 1887-2008)
Calais macrochaeta (NY; 1; ?)
Calendula officinalis (HOYT; 1; 2017)
Calycadenia fremontii (OSC, SOC, UBC, WS; 26; 1884-2007)
Calycadenia multiglandulosa (WTU; 1; ?)
Calycadenia truncata (HSC, OSC, SOC, UBC, WS, WTU; 50; 1884-2010)
Canadanthus modestus (HPSU, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, WS, WTU; 125; 1886-2014)
Carduus acanthoides (OSC; 3; 2007-2012)
ssp. acanthoides (OSC; 3; 2007-2012)
Carduus crispus (OSC; 3; 2016)
Carduus nutans (CIC, OSC, SRP, VALE, WS, WTU; 27; 1910-2009)
Carduus pycnocephalus (HPSU, ID, OSC, SRP, WTU; 29; 1929-2018)
ssp. pycnocephalus (WTU; 1; 2017)
Carduus tenuiflorus (OSC; 8; 1939-1999)
Carthamus lanatus (OSC, SOC, WS; 5; 1987-2004)
Carthamus tinctorius (NY, OSC, WTU; 5; 1957-1991)
Centaurea benedicta (ID, OSC, SOC, UBC, WS, WTU; 32; 1884-2007)
Centaurea biebersteinii (OSC; 1; 2011)
Centaurea calcitrapa (OSC, WS, WTU; 6; 1898-1993)
Centaurea cyanus (CIC, HPSU, HSC, LINF, MONT, OR, OSC, PLU, REED, RM, SOC, SRP, UBC, USFS, WCW, WS, WTU, WWB; 137; 1880-2019)
Centaurea debeauxii (UBC; 2; 1953)
Centaurea diffusa (CIC, HPSU, IDS, NY, OSC, RM, SOC, SRP, UBC, USFS, WCW, WS, WTU; 64; 1935-2019)
Centaurea ×gerstlaueri (BLMMD, HPSU, ID, OR, OSC, RM, SOC, SRP, UBC, WS, WTU; 98; 1918-2019)
Centaurea iberica (OSC, WTU; 5; 1954-2009)
Centaurea jacea (HSC, OSC, REED, SOC, WS, WTU; 11; 1932-2015)
Centaurea jacea × Centaurea nigra (WS; 6; 1918-1989)
Centaurea ×kleinii (BLMMD, OSC; 9; 2000-2006)
Centaurea melitensis (BLMMD, ID, OSC, RM, SOC, USFS, WS, WTU; 52; 1884-2005)
Centaurea montana (NY, OSC, WTU; 5; 1960-2002)
Centaurea nigra (HPSU, OSC, SOC, WS, WTU; 19; 1902-2017)
Centaurea nigrescens (IDE, OSC, WS, WTU; 15; 1919-2015)
Centaurea solstitialis (BLMMD, CIC, HSC, ID, NY, OSC, SOC, SRP, UAAH, UBC, USFS, WCW, WS, WTU, WWB; 67; 1914-2011)
Centaurea stoebe (HPSU, NY, OSC, RM, SOC, SRP, USFS, WS, WTU; 45; 1935-2018)
ssp. australis (HPSU, NY, OSC, RM, SOC, SRP, USFS, WS, WTU; 44; 1935-2018)
Centaurea ×varnensis (HOYT, HPSU, OSC, WTU; 9; 1953-2019)
Centaurea virgata (ID, IDE, OSC, SRP, V, WS, WTU; 12; 1988-2003)
ssp. squarrosa (ID, IDE, OSC, SRP, V, WS, WTU; 12; 1988-2003)
Centromadia fitchii (ID, OSC, SOC, UBC, WTU, WWB; 45; 1887-2018)
Centromadia pungens (HPSU, ID, OSC, WCW, WTU; 35; 1894-2019)
ssp. pungens (HPSU, OSC, WTU; 31; 1894-2019)
Chaenactis cusickii (BLMVL, CIC, ID, IDS, OSC, SRP, UBC, VALE, WS, WTU; 85; 1896-2020)
Chaenactis douglasii (BOIS, CIC, EWU, HPSU, HSC, ID, IDS, LEA, MONT, NY, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 424; 1881-2018)
var. alpina (HPSU, ID, OSC, REED, SRP, WS, WTU; 36; 1906-2002)
var. douglasii (CIC, HPSU, HSC, ID, OSC, SOC, SRP, VALE, WCW, WS, WTU, WWB; 294; 1881-2018)
Chaenactis macrantha (BBLM, CIC, OSC, VALE, WTU; 50; 1936-2011)
Chaenactis nevadensis (ID; 1; 1942)
Chaenactis nevii (CIC, HPSU, ID, OSC, SOC, SRP, UBC, WCW, WS, WTU; 68; 1885-2010)
Chaenactis stevioides (CIC, ID, OSC, SOC, VALE, WS, WTU; 49; 1927-2011)
Chaenactis xantiana (CIC, ID, OSC, SRP, VALE, WS, WTU; 22; 1901-2000)
Chaetadelpha wheeleri (BLMVL, CIC, ID, OSC, VALE, WTU; 25; 1896-2008)
Chamaemelum nobile (SRP; 1; 1982)
Chondrilla juncea (HPSU, ID, OSC, SRP, WTU; 20; 1974-2019)
Chrysanthemum nauseosus (WTU; 9; 1906-1965)
ssp. albicaulis (WTU; 2; 1906-1965)
ssp. consimilis (WTU; 6; 1935-1953)
ssp. nanus (WTU; 1; 1906)
Chrysothamnus humilis (CIC, ID, OSC, REED, SRP, UBC, VALE, WS, WTU; 37; 1894-2006)
Chrysothamnus nauseosus (UBC; 1; 1950)
var. albicualis (UBC; 1; 1950)
Chrysothamnus viscidiflorus (CIC, HPSU, ID, IDS, LINF, OSC, PNNL, PSM, REED, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 324; 1881-2018)
ssp. lanceolatus (CIC, HPSU, ID, LINF, OSC, SOC, SRP, VALE, WS, WTU; 51; 1887-2007)
ssp. puberulus (CIC, HPSU, ID, OSC, SOC, VALE; 51; 1894-2017)
ssp. viscidiflorus (CIC, HPSU, ID, IDS, OSC, REED, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 187; 1881-2018)
var. visicidiflorus (SRP; 1; 1912)
Chrysothamnus viscififlorus (LEA; 1; 1956)
Cichorium intybus (CIC, HPSU, ID, LINF, OSC, REED, RM, SOC, SRP, UBC, USFS, WCW, WS, WTU; 65; 1902-2019)
Cirsium andersonii (ID, OSC; 3; 1947-2007)
Cirsium arvense (BOIS, CIC, HJAEF, HJAEFB, HOYT, HPSU, HSC, ID, NY, OSC, REED, RM, SOC, SRP, VALE, WCW, WS, WTU; 153; 1889-2019)
Cirsium brevifolium (HPSU, ID, OSC, UBC, WCW, WS, WSTC, WTU; 47; 1888-2010)
Cirsium brevistylum (HJAEFB, HOYT, HPSU, OSC, SOC, WS, WTU; 53; 1885-2018)
Cirsium ciliolatum (ID, NY, OSC, SOC, WTU; 26; 1886-2013)
Cirsium clavatum (ID, REED; 4; 1937-1969)
var. americanum (ID, REED; 4; 1937-1969)
Cirsium cymosum (CIC, ID, IDS, OSC, RM, SOC, VALE, WS, WTU; 75; 1912-2013)
var. canovirens (CIC, ID, IDS, OSC, RM, SOC, VALE, WS, WTU; 58; 1912-2013)
var. cymosum (OSC, WTU; 12; 1920-1956)
Cirsium discolor (IDE; 1; 1963)
Cirsium douglasii (HJAEF, HJAEFB, ID, OSC, WS, WTU; 8; 1886-1978)
var. breweri (ID, OSC, WTU; 5; 1886-1949)
var. douglasii (WS; 1; 1950)
Cirsium eatonii (CIC, HPSU, ID, OSC, SRP, UBC, WS, WTU; 39; 1925-2010)
var. murdockii (CIC; 1; 2010)
var. peckii (CIC, ID, OSC, SRP, UBC, WS, WTU; 36; 1925-2007)
Cirsium edule (HPSU, HSC, ID, OSC, REED, SOC, WS, WTU; 72; 1881-2019)
var. edule (ID, OSC, SOC, WS, WTU; 34; 1882-2008)
Cirsium inamoenum (CIC, HPSU, IDE, IDS, OSC, RM, SOC, VALE, WS, WTU; 77; 1894-2017)
var. davisii (RM; 1; 2002)
var. inamoenum (CIC, IDE, IDS, OSC, RM, SOC, VALE, WS, WTU; 68; 1894-2017)
Cirsium neomexicanum (BLMVL, ID, OSC, SRP, WCW, WTU; 20; 1934-2004)
Cirsium occidentale (HPSU, ID, OSC, SOC, WS, WTU; 44; 1884-2007)
var. californicum (WTU; 1; 1973)
var. candidissimum (HPSU, ID, OSC, SOC, WS, WTU; 38; 1884-2007)
var. venustum (OSC; 3; 1926-1940)
Cirsium ochrocentrum (OSC; 1; 2003)
var. ochrocentrum (OSC; 1; 2003)
Cirsium remotifolium (BLMMD, HJAEF, HJAEFB, HPSU, ID, OSC, REED, RM, SOC, SRP, WS, WTU; 215; 1881-2019)
var. oregonense (RM; 1; 1901)
Cirsium scariosum (CIC, HPSU, ID, IDS, NY, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU; 153; 1876-2018)
var. scariosum (REED, WS; 7; 1945-1976)
Cirsium undulatum (HPSU, ID, NY, OSC, UBC, VALE, WCW, WS, WTU; 73; 1881-2019)
Cirsium vulgare (BOIS, CIC, EWU, HOYT, HPSU, HSC, ID, IDS, LINF, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, USFS, VALE, WCW, WS, WTU, WWB; 123; 1885-2019)
Cladanthus mixtus (OSC, WS, WTU; 4; 1902-1916)
Cnicus hallii (NY; 1; 1871)
Columbiadoria hallii (BLMMD, HJAEF, HPSU, ID, NY, OSC, SOC, SRP, UBC, WTU; 49; 1871-2013)
Conyza bonariensis (ID, OSC, WS, WTU; 7; 1900-2019)
Conyza canadensis (BLMMD, BLMVL, BOIS, CIC, HJAEFB, HPSU, HSC, ID, MONT, OSC, PSM, RM, SOC, SRP, UBC, USFS, VALE, WCW, WS, WTU; 176; 1880-2019)
Conyza sumatrensis (WS; 3; 1899-1910)
Conzya canadensis (LEA; 1; 1961)
Coreopsis douglasii (WCW; 1; 1941)
Coreopsis lanceolata (OSC, WS, WTU; 4; 1909-2010)
Coreopsis rosea (OSC, WTU; 2; 2009)
Coreopsis tinctoria (CIC, HPSU, ID, OSC, RM, SRP, UBC, WS, WTU; 59; 1877-2018)
Corethrogyne filaginifolia (BLMMD, ID, OSC, PSM, WS, WTU; 18; 1913-2012)
ssp. californica (WTU; 1; 1987)
Cosmos bipinnatus (SOC, WTU; 2; 2019)
Cota tinctoria (OSC, WS, WTU; 7; 1912-2008)
Cotula australis (OSC, WS, WTU; 11; 1899-2010)
Cotula coronopifolia (HPSU, ID, MONT, OSC, PSM, RM, SOC, SRP, UBC, WS, WTU, WWB; 79; 1884-1999)
Cotula mexicana (OSC; 1; 2009)
Crepis acuminata (BLMMD, BOIS, CIC, HPSU, HSC, ID, IDS, LEA, NY, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 263; 1894-2019)
var. acuminata (WTU; 2; 1946-1950)
Crepis atribarba (BLMVL, CIC, HPSU, ID, MONT, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 92; 1882-2012)
var. originalis (MONT; 1; 1941)
Crepis bakeri (BLMMD, HPSU, ID, IDS, OSC, SOC, UBC, WS, WTU; 68; 1899-2016)
Crepis barbigera (HPSU, ID, IDS, OSC, UBC, WS, WTU; 44; 1882-2017)
ssp. pauciflora (UBC; 4; 2005-2007)
Crepis biennis (WTU; 1; 1927)
Crepis capillaris (HPSU, ID, MONT, OSC, REED, RM, SOC, SRP, USFS, WS, WTU, WWB; 138; 1880-2014)
Crepis gracilis (WTU; 1; 1923)
Crepis intermedia (BOIS, HPSU, ID, IDS, NY, OSC, PLU, RM, SOC, SRP, UBC, WS, WTU; 106; 1881-2018)
Crepis laciniata (SRP; 1; 1920)
Crepis modocensis (BOIS, CIC, HPSU, ID, IDS, MONT, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 122; 1885-2017)
var. modocensis (RM, WTU; 7; 1950-2002)
Crepis monticola (OSC, SOC, WTU; 18; 1884-1997)
Crepis nicaeensis (OSC; 2; 1997)
Crepis occidentalis (BLMMD, BOIS, CIC, HPSU, ID, IDS, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 265; 1894-2017)
var. occidentalis (WTU; 3; 1953-1955)
Crepis pleurocarpa (BLMMD, CIC, HSC, ID, OSC, SOC, UBC, WS, WTU; 58; 1918-2012)
Crepis pulchra (OSC, SOC, SRP; 21; 1932-2017)
Crepis runcinata (CIC, HPSU, ID, IDS, NY, OSC, PSM, REED, SRP, UBC, VALE, WS, WTU; 76; 1885-2018)
ssp. runcinata (CIC, HPSU, ID, IDS, NY, OSC, SRP, UBC, VALE, WS, WTU; 67; 1885-2018)
Crepis setosa (HPSU, ID, OSC, SOC, SRP, UBC, USFS, WS, WTU, WWB; 65; 1912-2018)
ssp. setosa (WTU; 1; 1919)
Crepis tectorum (LEA, OSC; 3; 1957-1987)
Crepis vesicaria (IDS, OSC, SRP, WTU; 10; 1927-2016)
ssp. taraxaciflora (WTU; 1; 2004)
ssp. taraxacifolia (IDS, OSC, SRP; 9; 1927-2016)
Crocidium multicaule (BBLM, BLMVL, CIC, HJAEF, HOYT, HPSU, HSC, ID, LINF, OSC, PNNL, PSM, REED, SOC, SRP, UBC, WCW, WS, WTU, WWB; 299; 1879-2017)
Crupina vulgaris (BLMMD, ID, OSC, WS; 15; 1988-2015)
Cychlachaena xanthiifolia (WS; 2; 2007)
Cyclachaena xanthiifolia (CIC, ID, OSC, SRP, UBC, VALE, WTU; 33; 1894-2007)
Delairea odorata (BLMMD, OSC, WTU; 5; 1997-2008)
Dieteria canescens (BLMVL, BOIS, CIC, EWU, HPSU, ID, IDS, MONT, NY, OSC, PNNL, PSM, REED, SOC, SRP, UBC, VALE, WS, WTU; 336; 1885-2019)
var. canescens (CIC, HPSU, ID, NY, OSC, SOC, SRP, VALE, WS, WTU; 87; 1894-2016)
var. incana (CIC, OSC, SRP, WTU; 36; 1885-2019)
var. leucanthemifolia (EWU, OSC; 2; 1938-1979)
var. sessiliflora (CIC; 1; 1996)
var. shastensis (CIC, ID, MONT, OSC, SOC, SRP, UBC, WS, WTU; 158; 1885-2009)
Dimeresia howellii (BBLM, BBLM-OWY, BLMVL, CIC, HPSU, ID, IDS, LINF, MONT, NY, OSC, SOC, UBC, VALE, WS, WTU; 118; 1885-2019)
Doronicum pardalianches (HOYT, ID, OSC, SRP, WTU; 15; 2005-2017)
Doronicum plantagineum (OSC; 1; 1984)
Eatonella nivea (CIC, HPSU, MONT, OSC, VALE, WS, WTU; 51; 1894-2005)
Eclipta prostrata (WS; 1; 1900)
Erechtites glomeratus (ID, OSC, SOC, WTU; 20; 1913-2006)
Erechtites minimus (BLMMD, HPSU, ID, OSC, REED, SOC, SRP, UBC, USFS, WS, WTU; 79; 1924-2007)
Ericameria arborescens (OSC; 5; 1971-1993)
Ericameria bloomeri (BLMVL, EWU, HPSU, HSC, ID, MONT, OSC, SOC, SRP, UBC, VALE, WS, WTU; 145; 1880-2014)
Ericameria discoidea (CIC, HPSU, OSC, WS, WTU; 18; 1885-2007)
var. discoidea (OSC; 8; 1896-1990)
Ericameria greenei (CIC, HPSU, HSC, ID, OSC, RM, SOC, SRP, UBC, WS, WTU; 105; 1885-2009)
Ericameria hallii (WTU; 1; 1965)
Ericameria linearifolia (ID; 1; 1991)
Ericameria nana (CIC, ID, OSC, PSM, REED, VALE; 17; 1908-2006)
Ericameria nauseosa (BLMMD, BLMVL, BOIS, CIC, EWU, HPSU, HSC, ID, IDS, LINF, MONT, NY, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 386; 1881-2018)
ssp. consimilis (HPSU, VALE; 2; 1961-2002)
var. hololeuca (CIC, EWU, IDS, NY, OSC, SOC, VALE; 27; 1922-2009)
var. nana (ID, OSC, RM, WS; 25; 1897-2002)
var. nauseosa (BLMVL, ID, RM, VALE; 8; 1997-2004)
var. oreophila (CIC, ID, IDS, OSC, SOC, UBC, VALE, WS, WTU; 98; 1881-2014)
var. speciosa (CIC, HPSU, ID, MONT, OSC, REED, SOC, SRP, UBC, VALE, WCW, WS, WTU; 169; 1894-2009)
Ericameria parryi (CIC, OSC; 2; 1919-2002)
var. nevadensis (OSC; 1; 1919)
Ericameria resinosa (HPSU, ID, NY, OSC, PLU, PSM, REED, WTU; 35; 1894-1998)
Ericameria suffruticosa (CIC, HPSU, ID, OSC, WTU; 11; 1883-2015)
Ericameria viscidiflora (VALE; 1; 2002)
var. viscidiflora (VALE; 1; 2002)
Erigeron acris (BLMVL, HPSU, OSC, RM, WS, WTU; 18; 1887-2010)
var. kamtschaticus (BLMVL, OSC, RM, WS, WTU; 16; 1897-2010)
Erigeron aliceae (EWU, HJAEFB, HPSU, HSC, ID, MONT, NY, OSC, SOC, SRP, UBC, WS, WTU; 204; 1886-2015)
Erigeron annuus (CIC, HJAEF, HOYT, HPSU, ID, OSC, SOC, SRP, UBC, WS, WTU; 35; 1897-2018)
Erigeron aphanactis (CIC, HPSU, ID, IDS, OSC, PSM, UBC, VALE, WS, WTU, WWB; 69; 1885-2020)
var. aphanactis (CIC, OSC, UBC, VALE, WS; 53; 1885-2003)
Erigeron armeriaefolius (WTU; 1; 1920)
Erigeron aureus (MONT, OSC, SRP, WCW; 4; 1917-2002)
Erigeron bloomeri (BLMMD, BLMVL, BOIS, CIC, HPSU, HSC, ID, IDS, OSC, REED, SOC, SRP, UBC, VALE, WS, WTU; 223; 1884-2019)
var. bloomeri (BLMVL, CIC, HPSU, HSC, ID, OSC, SOC, SRP, VALE, WS, WTU; 122; 1885-2015)
var. nudatum (UBC; 2; 1941)
var. nudatus (HPSU, HSC, ID, OSC, SRP, UBC, WS, WTU; 47; 1884-2001)
Erigeron bloomeri × Erigeron linearis (WTU; 1; 1955)
Erigeron caespitosus (BLMVL, CIC, ID; 3; 1950-1990)
Erigeron cascadensis (CIC, HJAEFB, ID, OSC, REED, SOC, SRP, WS, WTU; 36; 1899-1994)
Erigeron cervinus (OSC, SOC, WS, WTU; 27; 1886-1986)
Erigeron chrysopsidis (BLMVL, CIC, DPP, HPSU, ID, IDS, LEA, LINF, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 322; 1880-2017)
var. austiniae (CIC, DPP, ID, LINF, MONT, OSC, SOC, VALE, WCW, WS, WTU; 91; 1896-2015)
var. brevifolius (ID, OSC, SOC, SRP, WCW, WS, WTU; 40; 1899-2008)
var. chrysopsidis (BLMVL, CIC, HPSU, ID, OSC, SRP, WS, WTU; 126; 1880-2013)
Erigeron compositus (BLMVL, CIC, HPSU, ID, IDS, MONT, OSC, PSM, REED, RM, SOC, SRP, VALE, WCW, WS, WTU; 197; 1885-2015)
ssp. compositus (WTU; 1; 1927)
Erigeron concinnus (CIC, HPSU, ID, REED, WTU; 9; 1880-2012)
var. concinnus (HPSU, ID; 2; 1880-2012)
Erigeron corymbosus (BLMVL, BOIS, CIC, HPSU, ID, IDS, OSC, REED, RM, SOC, SRP, VALE, WS, WTU; 132; 1885-2019)
Erigeron coulteri (ID, OSC, REED, RM, SRP, WS, WTU; 44; 1896-2002)
Erigeron davisii (OSC; 10; 1991-2008)
Erigeron decumbens (HPSU, ID, NY, OSC, SOC, SRP, WTU; 63; 1871-2002)
Erigeron disparipilus (ID, OSC, SRP, WTU; 10; 1949-2017)
Erigeron divergens (CIC, DPP, HPSU, ID, OSC, RM, SOC, SRP, VALE, WTU; 77; 1877-2008)
Erigeron eatonii (BLMVL, CIC, DPP, EWU, ID, MONT, NY, OSC, REED, RM, SOC, SRP, WS, WTU; 163; 1897-2015)
var. lavandulus (OSC, WTU; 14; 1899-2015)
var. plantagineus (ID, OSC, SOC, SRP, WTU; 53; 1920-2004)
var. villosus (BLMVL, CIC, ID, NY, OSC, REED, RM, WS, WTU; 74; 1897-2013)
Erigeron elegantulus (CIC, ID, OSC, SRP, UBC, VALE, WS, WTU; 42; 1894-2004)
Erigeron engelmannii (ID; 1; 1996)
Erigeron eradiatus (WTU; 1; 1884)
Erigeron filifolius (BLMVL, BOIS, CIC, HPSU, ID, IDS, LEA, MONT, NY, OSC, PSM, REED, SOC, SRP, UBC, VALE, WCW, WS, WTU; 264; 1881-2019)
Erigeron foliosus (BLMMD, HJAEF, HPSU, HSC, ID, IDS, MONT, NY, OSC, SOC, SRP, UBC, WS, WTU; 208; 1884-2012)
var. confinis (BLMMD, HJAEF, HPSU, HSC, ID, IDS, NY, OSC, SOC, SRP, UBC, WS, WTU; 185; 1884-2012)
var. foliosus (ID; 2; 1947)
Erigeron glacialis (CIC, HPSU, HSC, ID, MONT, OSC, RM, SOC, SRP, UBC, WCW, WS, WTU, WWB; 406; 1882-2018)
var. glacialis (CIC, HPSU, HSC, ID, MONT, OSC, RM, SOC, SRP, UBC, WS, WTU, WWB; 386; 1882-2018)
Erigeron glaucus (HPSU, ID, MONT, OSC, PSM, REED, SOC, UBC, WS, WTU; 75; 1875-2008)
Erigeron grandiflorus (MONT, OSC, REED, SRP, WCW, WS, WTU; 27; 1907-2002)
Erigeron hesperocallis (WTU; 1; 1916)
Erigeron hispidissimus (WTU; 1; 1927)
Erigeron howellii (HPSU, OSC, SRP, UBC, WS, WTU; 38; 1880-1989)
Erigeron inornatus (CIC, HPSU, HSC, ID, OSC, SOC, SRP, UBC, WTU; 76; 1884-2018)
var. inornatus (CIC, HSC, ID, OSC, SOC, SRP, UBC, WTU; 63; 1884-2018)
Erigeron karvinskianus (WTU; 1; 2008)
Erigeron klamathensis (HSC, OSC; 15; 1917-2009)
Erigeron latus (CIC, ID, OSC, VALE; 10; 2000-2003)
Erigeron linearis (BLMVL, BOIS, CIC, HPSU, ID, IDS, LEA, LINF, MONT, NY, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 395; 1880-2018)
Erigeron lonchophyllus (BLMVL, CIC, HPSU, OSC, VALE, WS, WTU; 55; 1885-2015)
Erigeron membranaceus (REED, WS; 5; 1897-1909)
Erigeron microlonchus (REED, WTU; 3; 1907)
Erigeron nemophilus (NY; 1; 1898)
Erigeron nevadensis (WTU; 1; 1932)
Erigeron nivalis (HPSU, ID, OSC, SOC, SRP, WS, WTU; 46; 1915-1995)
Erigeron oreganus (HPSU, OSC, WS, WTU; 30; 1880-2013)
Erigeron peregrinus (REED, WTU; 2; 1920-1973)
var. peregrinus (REED, WTU; 2; 1920-1973)
Erigeron petrophilus (HPSU, OSC, SOC, WS, WTU; 16; 1935-2004)
var. petrophilus (HPSU, OSC, SOC; 12; 1935-2004)
Erigeron philadelphicus (CIC, HPSU, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 181; 1883-2018)
var. philadelphicus (HPSU, ID, RM, SOC, SRP, WTU; 9; 1952-2018)
Erigeron poliospermus (BOIS, CIC, HPSU, ID, LINF, MONT, NY, OSC, SRP, UBC, WS, WTU; 134; 1881-2019)
var. disciformis (NY; 1; 1894)
var. poliospermus (HPSU, ID, LINF, OSC, SRP, UBC, WS, WTU; 101; 1881-2006)
Erigeron pumilus (BLMVL, BOIS, CIC, DPP, EWU, HPSU, ID, IDS, LEA, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 303; 1882-2019)
var. intermedius (BLMVL, BOIS, CIC, DPP, HPSU, ID, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU, WWB; 258; 1882-2018)
Erigeron salsuginosus (LEA, REED, WS, WTU; 15; 1908-1949)
Erigeron secundifolia (RM; 1; 1899)
Erigeron siskiyouensis (WTU; 1; 1887)
Erigeron speciosus (BLMVL, CIC, EWU, HPSU, ID, MONT, OSC, PSM, REED, RM, SOC, SRP, WCW, WS, WTU; 178; 1881-2018)
Erigeron stanselliae (OSC; 4; 1970-2009)
Erigeron strigosus (HPSU, ID, OSC, SOC, SRP, WS, WTU; 68; 1881-2018)
var. septentrionalis (OSC, WS, WTU; 5; 1897-2018)
var. strigosus (HPSU, ID, OSC, SRP, WS; 45; 1881-2001)
Erigeron tegetarius (NY; 2; 1894-1907)
Erigeron tener (OSC, WS; 5; 1900-1959)
Erigeron vagus (HPSU, ID, OSC, WS; 21; 1886-1975)
Eriophyllum achillaeoides (WTU; 3; 1925-1931)
Eriophyllum caespitosum (WTU; 1; 1905)
Eriophyllum gracile (WTU; 2; 1935)
Eriophyllum harfordii (NY, WTU; 3; 1869-1934)
Eriophyllum lanatum (BLMMD, BLMVL, BOIS, CIC, EWU, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LEA, LINF, MONT, NY, OSC, PLU, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 1060; 1871-2020)
var. achillioides (CIC, HPSU, ID, NY, OSC, SOC, SRP, UBC, VALE, WS, WTU; 267; 1884-2016)
var. arachnoideum (SRP; 1; 2011)
var. grandiflorum (OSC; 2; 1932-1939)
var. integrifolium (BLMVL, BOIS, CIC, HPSU, ID, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 331; 1881-2020)
var. lanatum (HJAEF, HJAEFB, HPSU, ID, OSC, REED, RM, SRP, UBC, WCW, WS, WTU; 63; 1926-2010)
var. lanceolatum (HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 80; 1887-2002)
var. leucophyllum (HSC, ID, MONT, OSC, SOC, SRP, WS, WTU; 142; 1882-2013)
Eriophyllum leucophyllum (WTU; 2; 1920-1935)
Eriophyllum staechadifolium (OSC, SOC, WS, WTU; 21; 1884-1983)
var. artemisifolium (SOC; 1; 1981)
Eriophyllum stoechadifolium (WTU; 1; 1936)
var. artemisiaefolium (WTU; 1; 1936)
Eriophyllum ternatum (WTU; 1; 1928)
Eriophyllum watsoni (WTU; 2; 1939)
Eucephalus breweri (OSC; 4; 1929-2005)
Eucephalus elegans (OSC, REED, WS, WTU; 26; 1896-1984)
Eucephalus engelmannii (MONT; 1; 1917)
Eucephalus glabratus (HPSU, ID, NY, OSC, SOC, WS, WTU; 34; 1888-2015)
Eucephalus gormanii (OSC, WS, WTU; 41; 1907-2007)
Eucephalus ledophyllus (CIC, HJAEF, HJAEFB, HPSU, ID, MONT, NY, OSC, SOC, SRP, UBC, WCW, WS, WTU; 184; 1871-2016)
var. covillei (CIC, ID, OSC, SOC, SRP, UBC, WS, WTU; 27; 1902-2016)
var. ledophyllus (HPSU, NY, SOC, SRP, WS, WTU; 16; 1871-2008)
Eucephalus paucicapitatus (WCW, WS; 3; 1917-1929)
Eucephalus tomentellus (BLMMD, OSC, SOC, WS, WTU; 32; 1889-2011)
Eucephalus vialis (ID, MONT, NY, OSC, SOC, SRP, WS, WTU; 39; 1888-2015)
Euchiton gymnocephalus (HSC, OSC, WTU; 8; 1939-2005)
Euchiton japonicus (BLMMD, ID, OSC, WTU; 9; 1947-2002)
Euchiton sphaericus (HPSU, OSC, SRP, WS, WTU; 20; 1919-2014)
Eupatorium californicum (WTU; 1; 1939)
Eupatorium cannibinum (HPSU; 1; 2019)
Eupatorium perfoliatum (SOC; 1; 1977)
Eurybia conspicua (BLMVL, ID, IDS, OSC, RM, SRP, WS, WTU; 54; 1898-2008)
Eurybia integrifolia (HPSU, ID, OSC, RM, SOC, SRP, WCW, WS, WTU; 52; 1896-2010)
Eurybia macrophylla (CIC; 1; 1954)
Eurybia merita (HPSU, OSC, RM, SOC, WTU; 48; 1882-2015)
Eurybia radulina (BLMMD, HJAEFB, HOYT, HPSU, HSC, ID, MONT, OR, OSC, SOC, SRP, UBC, WS, WTU; 128; 1879-2019)
Eurybia sibirica (WS; 3; 1907-1946)
Euthamia graminifolia (OSC, WTU; 2; 1997-2013)
Euthamia occidentalis (BLMMD, CIC, HPSU, ID, OSC, PSM, REED, SOC, SRP, UBC, VALE, WTU; 113; 1881-2018)
Filago arvensis (OSC, WS, WTU; 7; 1970-2018)
Filago pyramidata (OSC; 1; 1937)
var. pyramidata (OSC; 1; 1937)
Filago vulgaris (OSC, WTU; 2; 1937-2005)
Franseria bipinnatifida (WTU; 2; 1884-1936)
var. insulaus (WTU; 1; 1884)
Franseria hookeniana (WTU; 1; 1871)
Franseria hookeriana (WCW; 1; 1898)
Gaertneria chamissonis (WCW; 1; 1953)
Gaillardia aristata (BLMVL, CIC, HPSU, ID, OSC, PSM, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 111; 1880-2018)
Gaillardia pulchella (OSC; 1; 1992)
Galinsoga parviflora (HOYT, HPSU, OSC, WS, WTU; 5; 1982-2012)
Galinsoga quadriradiata (HPSU, OSC, SRP, WTU; 13; 1978-2019)
Gamochaeta purpurea (HPSU, ID, OSC, REED, SRP, UBC, WTU; 43; 1882-2013)
Gamochaeta ustulata (HPSU, OSC, SOC, WS; 87; 1881-2006)
Gamocheta purpurea (WS; 1; 2005)
Glebionis segetum (OSC, WTU; 5; 1928-2008)
Glyptopleura marginata (CIC, HPSU, ID, LINF, MONT, OSC, SOC, VALE, WS, WTU; 57; 1901-2008)
Gnaphalium affine (WS; 2; 1899-1901)
Gnaphalium palustre (BBLM, BBLM-OWY, CIC, EWU, HPSU, ID, LINF, MONT, OSC, PSM, RM, SOC, SRP, UBC, VALE, WS, WTU; 200; 1879-2019)
Gnaphalium palustre × Gnaphalium uliginosum (WTU; 1; 1992)
Gnaphalium uliginosum (EWU, HOYT, HPSU, ID, OSC, SOC, SRP, WS, WTU; 42; 1880-2018)
Grindelia hirsutula (CIC, DPP, HPSU, ID, IDS, MONT, OSC, PSM, RM, SOC, SRP, UBC, WCW, WS, WTU; 269; 1881-2019)
Grindelia integrifolia (HOYT, HPSU, ID, IDS, MONT, OSC, PSM, REED, SOC, SRP, UBC, WS, WTU; 91; 1882-2016)
Grindelia nana (NY; 1; ?)
f. longisquama (NY; 1; ?)
Grindelia squarrosa (CIC, ID, OSC, SRP, UBC, VALE, WCW, WS, WTU; 34; 1937-2018)
Gutierrezia ionensis (COLO, NY; 2; 1983)
Gutierrezia sarothrae (CIC, HPSU, ID, IDS, MONT, OSC, SRP, UBC, VALE, WCW, WS, WTU; 81; 1894-2018)
Haplopappus acaulis (WTU; 2; 1953)
var. acaulis (WTU; 2; 1953)
Haplopappus hirsutus (NY; 1; 1882)
Haplopappus howellii (HPSU, NY; 5; 1885)
Haplopappus racemosus (WTU; 1; 1965)
var. congestus (WTU; 1; 1965)
Hazardia whitneyi (ID, OSC, SOC, WTU; 19; 1935-2001)
var. discoidea (OSC, SOC; 15; 1935-2001)
var. whitneyi (ID; 1; 1949)
Helenium autumnale (HOYT, HPSU, ID, OSC, REED, SOC, SRP, UBC, WS, WTU; 77; 1880-2018)
Helenium bigelovii (BLMMD, HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 129; 1884-2015)
Helenium bolanderi (HPSU, ID, MONT, OSC, SOC, SRP, UBC, WS, WTU; 47; 1887-2012)
Helenium grandiflorum (WTU; 2; 1928-1929)
Helenium puberulum (WS; 5; 1884-1950)
Helianthella californica (HPSU, OSC, SOC; 4; 1899-2002)
ssp. nevadensis (OSC, SOC; 3; 1899-2002)
Helianthella quinquenervis (OSC, WTU; 7; 1896-2012)
Helianthella uniflora (BLMVL, CIC, HPSU, ID, IDS, OSC, RM, SRP, UBC, VALE, WS, WTU; 145; 1880-2010)
var. douglasii (BLMVL, HPSU, ID, IDS, OSC, SRP, UBC, WTU; 85; 1880-2010)
var. uniflora (CIC, OSC, VALE; 11; 1912-2007)
Helianthella uniflorus (LEA; 2; 1957)
Helianthus annuus (BOIS, CIC, HPSU, ID, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 119; 1878-2019)
Helianthus bolanderi (OSC, SOC; 8; 1909-1974)
Helianthus cusickii (CIC, HPSU, ID, OSC, SRP, UBC, VALE, WCW, WS, WTU; 96; 1885-2013)
Helianthus exilis (WTU; 1; 1892)
Helianthus maximiliani (WS; 1; 1915)
Helianthus nuttallii (CIC, ID, OSC, VALE, WS, WTU; 31; 1917-2011)
ssp. nuttallii (OSC, WS; 7; 1917-2003)
Helianthus petiolaris (HPSU, ID, OSC, UBC, WS; 5; 1910-2009)
ssp. petiolaris (WS; 1; 1910)
Helianthus tuberosus (OSC, SRP, WS; 6; 1896-1959)
Helichrysum petiolare (WS; 1; 1911)
Heliopsis helianthoides (WS; 1; 1909)
var. scabra (WS; 1; 1909)
Helminthotheca echioides (ID, OSC, SOC, SRP, WS, WTU; 25; 1956-2017)
Hemizonella minima (HJAEFB, HPSU, HSC, ID, IDS, MONT, OSC, PSM, RM, SOC, SRP, UBC, WS, WTU; 156; 1884-2016)
Hemizonia congesta (OSC, SOC, WCW, WTU; 22; 1887-2003)
ssp. clevelandii (OSC, SOC, WTU; 18; 1887-1997)
ssp. luzulifolia (WCW; 1; 1902)
Hemizonia luzulaefolia (UBC, WTU; 2; 1887-1985)
Hemizonia parvula (NY; 1; 1864)
Hesperevax acaulis (OSC, SOC, WTU; 9; 1881-1995)
var. acaulis (OSC; 1; 1993)
var. robustior (OSC, WTU; 7; 1881-1995)
Hesperevax caulescens (NY; 2; 1884-1887)
Hesperevax sparsiflora (OSC, SOC; 6; 1919-2013)
var. brevifolia (OSC; 5; 1919-2013)
Heterotheca hispida (ID; 10; 1938-2011)
Heterotheca oregona (BLMMD, HPSU, ID, IDS, OSC, REED, SOC, SRP, UBC, WTU; 63; 1887-2019)
var. oregona (BLMMD, IDS, SOC, WTU; 11; 1918-1993)
var. rudis (WTU; 1; 1965)
Heterotheca vespertina (ID; 1; 1928)
Heterotheca villosa (BLMVL, CIC, HPSU, IDS, NY, OSC, SOC, SRP, UBC, WCW, WS, WTU; 126; 1880-2019)
var. minor (HPSU, NY, OSC, SOC, WCW, WS, WTU; 59; 1882-2018)
var. villosa (BLMVL, CIC, HPSU, IDS, OSC, SOC, SRP, WS, WTU; 58; 1880-2017)
Heterotheca viscida (MONT; 1; 1917)
Hieracium alberinum (HJAEFB, HPSU; 7; 1915-2008)
Hieracium albiflorum (BLMMD, BLMVL, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 365; 1875-2018)
Hieracium albiflorum × Hieracium bolanderi (WTU; 1; 1973)
Hieracium albiflorum × Hieracium parryi (WTU; 1; 1973)
Hieracium albiflorum × Hieracium scouleri (WTU; 1; 1973)
Hieracium ambiguum (WS; 5; 1913-1921)
Hieracium argutum (IDE; 1; 2002)
Hieracium aurantiacum (HPSU, ID, OSC, WTU; 16; 1927-2016)
Hieracium barbigerum (NY; 2; 1887)
Hieracium bolanderi (BLMMD, HSC, ID, OSC, SOC, WS, WTU; 31; 1884-2009)
Hieracium caespitosum (HPSU, ID, OSC, WS, WTU; 19; 2001-2019)
Hieracium diaphanum (SRP, WS; 2; 2003)
Hieracium greenei (HPSU, ID, NY, OSC, SOC, SRP, WS, WTU; 39; 1887-2015)
Hieracium horridum (CIC, OSC, WS; 6; 1925-2005)
Hieracium howellii (WS; 1; 1909)
Hieracium lachenalii (HOYT, HPSU, OR, OSC, SRP, WTU; 17; 2003-2019)
Hieracium longiberbe (HPSU, ID, NY, OSC, WS, WTU; 34; 1880-2004)
Hieracium maculatum (HPSU; 1; 2019)
Hieracium murorum (HOYT, HPSU, OSC, WTU; 8; 1960-2018)
Hieracium nudicaule (ID, SOC; 7; 1942-1987)
Hieracium parryi (BLMMD, OSC, SOC, WTU; 76; 1884-2006)
Hieracium parryi × Hieracium scouleri var. nudicaule (WTU; 1; 1950)
Hieracium pilosella (OSC, WS, WTU; 7; 1919-2008)
Hieracium piloselloides (OSC, RM; 2; 2003)
Hieracium sabaudum (HPSU, WTU; 5; 2017)
Hieracium scouleri (CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDE, IDS, MONT, NY, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 458; 1882-2018)
var. cynoglossoides (WTU; 9; 1927-1950)
Hieracium triste (HPSU, ID, OSC, REED, RM, SOC, SRP, WS, WTU; 130; 1878-2018)
Hieracium umbellatum (HOYT, HPSU, OSC, WTU; 13; 1878-2018)
Hieracium vulgatum (OSC, UBC, WS; 5; 1960-2005)
Homopappus glomeratus (NY; 1; ?)
Hoorebekia curvata (WS; 1; 1916)
Hoorebekia lanuginosa (REED; 1; 1908)
Hulsea algida (ID, OSC, WS, WTU; 26; 1898-1997)
Hulsea nana (HPSU, ID, OSC, REED, SOC, UBC, WS, WTU; 102; 1894-2013)
Hymenopappus filifolius (CIC, ID, OSC, SRP, VALE, WS, WTU; 49; 1885-2009)
var. filifolius (CIC, ID, OSC, SRP, WS, WTU; 40; 1885-2009)
Hymenoxys cooperi (CIC, HPSU, OSC, SRP, WTU; 13; 1976-2005)
Hymenoxys hoopesii (CIC, HPSU, ID, IDS, OSC, PSM, SOC, SRP, WS, WTU; 64; 1898-2007)
Hypochaeris glabra (HPSU, ID, LINF, OSC, SOC, SRP, UBC, WS, WTU; 51; 1910-2015)
Hypochaeris radicata (HJAEF, HJAEFB, HPSU, ID, LINF, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, USFS, WS, WTU; 157; 1889-2020)
Inula helenium (BLMMD, HPSU, OSC, WS, WTU; 33; 1887-2017)
Ionactis alpina (CIC, HPSU, ID, IDS, MONT, OSC, SOC, SRP, UBC, VALE, WS, WTU, WWB; 129; 1885-2017)
Ionactis stenomeres (WTU; 2; 1925-2013)
Iva axillaris (CIC, HPSU, ID, IDS, NY, OSC, SOC, SRP, UBC, VALE, WS, WTU; 155; 1882-2013)
Iva microcephala (SRP; 1; ?)
Jacobaea maritima (OSC, WTU; 4; 1956-2011)
Jacobaea vulgaris (BLMMD, CIC, HJAEF, HPSU, HSC, ID, IDS, LINF, MONT, OSC, PSM, REED, SOC, SRP, UBC, WS, WTU; 138; 1910-2014)
Jaumea carnosa (HPSU, ID, OSC, REED, SRP, UBC, WS, WTU; 35; 1882-2009)
Kyhosia bolanderi (HJAEF, ID, OSC, SOC, SRP, UBC, WTU; 45; 1899-2015)
Kyshosia bolanderi (HPSU; 1; 2007)
Lactuca biennis (CIC, HJAEFB, HPSU, ID, OSC, WS; 37; 1880-2006)
Lactuca canadensis (OSC, WS; 4; 1885-1964)
Lactuca ludoviciana (OSC; 4; 1928-1933)
Lactuca saligna (ID, OSC, SOC, SRP, UBC, WS, WTU; 30; 1931-2012)
Lactuca sativa (OSC; 1; ?)
Lactuca serriola (BOIS, CIC, HJAEFB, HPSU, ID, IDS, OSC, PSM, REED, RM, SOC, SRP, USFS, VALE, WS, WTU, WWB; 97; 1894-2019)
Lactuca tatarica (CIC, HPSU, IDS, OSC, REED, SRP, VALE, WS, WTU; 58; 1875-2013)
ssp. pulchella (CIC, HPSU, IDS, OSC, REED, SRP, VALE, WS, WTU; 57; 1875-2013)
Lagophylla ramosissima (BBLM-OWY, BLMVL, BOIS, CIC, HPSU, HSC, ID, OSC, PSM, SOC, SRP, UBC, VALE, WS, WTU, WWB; 170; 1880-2019)
Lapsana communis (CIC, HOYT, HPSU, ID, LEA, LINF, OSC, RM, SOC, UBC, WS, WTU; 72; 1881-2018)
Lapsanastrum apogonoides (ID, IDS, OSC, WCW, WS, WTU; 7; 1940)
Lasthenia californica (HPSU, HSC, ID, LINF, OSC, SOC, SRP, UBC, WS, WTU; 57; 1881-2013)
ssp. californica (ID, OSC, SOC, SRP, WS; 40; 1881-2013)
ssp. macrantha (ID, WTU; 2; 1966)
Lasthenia glaberrima (CIC, ID, OSC, UBC, WS, WTU; 43; 1884-2012)
Lasthenia gracilis (ID; 1; 1948)
Lasthenia maritima (OSC, WS, WTU; 11; 1930-2010)
Lasthenia minima (NY, WS; 4; 1898)
Lasthenia ornduffii (OSC, SOC, WS; 31; 1919-2012)
Layia carnosa (SOC; 1; 1990)
Layia chrysanthemoides (SOC; 1; 1937)
Layia fremontii (OSC, SOC; 2; 2012-2013)
Layia glandulosa (CIC, HPSU, ID, LINF, OSC, PSM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 233; 1880-2008)
Layia platyglossa (SOC; 1; 1956)
Layia septentrionalis (SOC; 1; 2013)
Leontodom saxatilis (WS; 1; 2007)
ssp. saxatilis (WS; 1; 2007)
Leontodon autumnalis (HPSU, PLU, SRP, WS, WTU; 7; 1902-2014)
Leontodon hirtum (HPSU; 1; 1975)
Leontodon saxatilis (HPSU, ID, OSC, SOC, SRP, UBC, WS, WTU; 53; 1912-2014)
ssp. saxatilis (HPSU, ID, OSC, SOC, SRP, UBC, WS, WTU; 50; 1912-2009)
Lessingia nemaclada (WTU; 1; 1965)
Leucanthemum maximum (OSC, WS, WTU; 4; 1918-2017)
Leucanthemum ×superbum (HPSU, OSC, SRP, WTU; 5; 2014-2016)
Leucanthemum vulgare (CIC, HJAEF, HJAEFB, HPSU, ID, IDE, LEA, LINF, MONT, NY, OSC, REED, RM, SOC, SRP, UBC, USFS, VALE, WCW, WS, WTU; 157; 1876-2014)
Liatris spicata (IDE; 1; 1986)
Logfia gallica (OSC, SRP, WS, WTU; 15; 1995-2014)
Logfia minima (HPSU, OSC, WTU; 5; 1971-2018)
Luina hypoleuca (BLMMD, HSC, ID, OSC, SOC, SRP, WS, WTU; 73; 1884-2007)
Luina serpentina (ID, MONTU, NY, OSC, REED, RM, UBC, WS, WTU; 18; 1953-2013)
Lygodesmia juncea (BLMVL, IDE, OSC; 3; 1951-2011)
Macronema filiformis (RM; 1; 1897)
Macronema glomerata (NY, RM; 2; 1899)
Macronema scoparia (RM; 1; 1899)
Macronema scoparium (NY; 1; 1899)
Macronema walpoliana (RM; 1; 1899)
Madia citrigracilis (WS, WTU, WWB; 4; 1914-1972)
Madia citriodora (HPSU, ID, OSC, PSM, SOC, SRP, UBC, WCW, WS, WTU; 42; 1886-1998)
Madia corymbosa (WS; 1; 1914)
Madia elegans (BLMMD, HPSU, ID, OSC, PSM, RM, SOC, SRP, UBC, WS, WTU; 155; 1871-2016)
Madia exigua (BLMVL, CIC, HPSU, HSC, ID, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 178; 1876-2018)
Madia filipes (WTU; 1; 1871)
Madia glomerata (BLMVL, CIC, HPSU, ID, LEA, LINF, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 200; 1871-2018)
Madia gracilis (BLMVL, CIC, HJAEF, HJAEFB, HOYT, HPSU, HSC, ID, IDS, MONT, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 299; 1881-2018)
Madia racemosa (WCW; 1; 1933)
Madia sativa (BLMMD, HPSU, ID, LINF, MONT, OSC, PSM, REED, SRP, WS, WTU, WWB; 80; 1881-2018)
Malacothrix crepoides (NY; 1; ?)
Malacothrix glabrata (CIC, HPSU, ID, MONT, OSC, SOC, VALE, WS, WTU; 66; 1885-2008)
Malacothrix sonchoides (CIC, IDS, OSC, UBC, VALE; 11; 1975-2018)
Malacothrix stebbinsii (OSC; 1; 1894)
Malacothrix torreyi (CIC, HPSU, ID, MONT, OSC, PSM, UBC, VALE, WS, WTU; 105; 1885-2010)
Matricaria chamomilla (HPSU, LINF, OSC, SOC, WS; 7; 1912-2012)
Matricaria discoidea (BLMVL, CIC, EWU, HOYT, HPSU, HSC, ID, IDS, LEA, OSC, RM, SOC, SRP, UBC, USFS, VALE, WCW, WS, WTU; 128; 1886-2018)
Matricaria occidentalis (OSC; 2; 1927-1953)
Matricatia discoidea (WS; 1; 2008)
Micropus californicus (HPSU, HSC, ID, OSC, SOC, SRP, UBC, WS, WTU; 111; 1884-2016)
var. californicus (HSC, ID, OSC, SOC, SRP, WS, WTU; 92; 1884-2012)
Microseris acuminata (OSC, SOC, WTU; 9; 1930-1989)
Microseris bigelovii (OSC, UBC, WTU; 20; 1884-2010)
Microseris borealis (HPSU, ID, OR, OSC, SRP, WS, WTU; 50; 1881-2019)
Microseris detlingii (WTU; 2; 1978-1982)
Microseris douglasii (HPSU, LINF, OSC, WTU; 5; 1889-1926)
ssp. douglasii (OSC; 2; 1889)
Microseris howellii (BLMMD, NY, OSC, SOC, WS, WTU; 54; 1884-1998)
Microseris laciniata (BLMMD, CIC, HPSU, HSC, ID, IDS, NY, OSC, SOC, SRP, UBC, WS, WTU; 273; 1881-2012)
ssp. detlingii (IDS, NY, OSC, SOC, UBC, WS, WTU; 39; 1889-2000)
ssp. laciniata (BLMMD, ID, OSC, SOC, SRP, WS, WTU; 104; 1884-2012)
ssp. leptosepala (ID, OSC, SOC, UBC, WS, WTU; 77; 1881-1998)
ssp. siskiyouensis (HSC, OSC, SOC, WTU; 18; 1918-2007)
Microseris nutans (BLMVL, CIC, HJAEF, HJAEFB, HPSU, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 323; 1882-2018)
Microseris oligantha (NY; 1; 1889)
Mycelis muralis (HJAEFB, HPSU, ID, IDS, OSC, REED, RM, SRP, USFS, WS, WTU; 35; 1942-2015)
Nabalus alatus (SOC; 1; 1996)
Nabalus hastata (WTU; 1; 1924)
Nabalus hastatus (OSC; 18; 1880-2014)
Nestotus stenophyllus (BLMVL, CIC, ID, IDS, OSC, SOC, UBC, VALE, WCW, WS, WTU; 74; 1896-2015)
Nothocalais alpestris (BLMVL, HJAEF, HPSU, ID, OSC, PSM, SOC, UBC, WCW, WS, WTU, WWB; 158; 1884-2012)
Nothocalais nigrescens (ID, MONT; 2; 1934-2000)
Nothocalais troximoides (CIC, HPSU, ID, IDS, NY, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 216; 1882-2019)
Oncosiphon suffruticosum (OSC, WS; 5; 1902)
Onopordum acanthium (BOIS, CIC, OSC, RM, SOC, SRP, WCW, WS, WTU, WWB; 33; 1942-2018)
ssp. acanthium (OSC, SOC, WTU; 17; 1942-2018)
Onopordum tauricum (OSC; 4; 2007)
Oreostemma alpigenum (BLMMD, CIC, HJAEF, HPSU, HSC, ID, IDS, OSC, REED, SOC, SRP, UBC, V, WCW, WS, WTU; 220; 1882-2015)
ssp. alpigenum (V; 1; 1976)
var. alpigenum (HPSU, ID, OSC, SRP, UBC, WS, WTU; 99; 1882-2011)
var. andersonii (BLMMD, HJAEF, HPSU, HSC, OSC, SOC, WS, WTU; 30; 1884-2006)
var. haydenii (CIC, HPSU, ID, IDS, OSC, SRP, UBC, WS, WTU; 70; 1897-2015)
Packera aurea (ID; 1; 1938)
Packera bolanderi (HJAEFB, HPSU, HSC, ID, NY, OSC, PSM, REED, SOC, SRP, UBC, WS, WTU; 214; 1877-2018)
var. bolanderi (OSC, SOC, SRP, WS, WTU; 90; 1884-2009)
var. harfordii (HJAEFB, HPSU, ID, OSC, REED, SOC, UBC, WS, WTU; 96; 1877-2018)
Packera cana (BLMMD, CIC, HPSU, HSC, ID, IDS, LINF, MONT, OSC, PLU, PSM, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 434; 1881-2018)
Packera contermina (RM, WS; 17; 1896-2001)
Packera eurycephala (IDS, OSC, SRP; 9; 1896-2016)
var. eurycephala (IDS, OSC, SRP; 8; 1896-2016)
Packera flettii (OSC, SRP, WTU; 14; 1971-2001)
Packera greenei (SOC; 1; 2015)
Packera hesperia (BLMMD, HPSU, NY, OSC, SOC, UBC, WS, WTU; 44; 1884-2009)
Packera macounii (BLMMD, HPSU, HSC, ID, IDS, OSC, REED, SOC, SRP, UBC, WS, WTU; 134; 1881-2018)
Packera multilobata (WS; 1; 1970)
Packera pauciflora (HPSU; 1; 1966)
Packera paupercula (PSM, WS; 5; 1957-1969)
Packera porteri (OSC, WS; 2; 1899)
Packera pseudaurea (CIC, EWU, HPSU, ID, LINF, OSC, RM, SOC, SRP, WS, WTU; 120; 1880-2014)
var. pseudaurea (CIC, HPSU, ID, OSC, RM, SOC, SRP, WS, WTU; 95; 1880-2014)
Packera streptanthifolia (CIC, HJAEF, HPSU, ID, IDE, LINF, OSC, REED, SRP, WCW, WS, WTU; 91; 1885-2011)
Packera subnuda (CIC, EWU, HPSU, ID, OSC, REED, RM, SOC, SRP, WS, WTU; 117; 1878-2018)
var. subnuda (CIC, ID, OSC, SOC, SRP, WTU; 101; 1878-2018)
Petasites fragrans (CIC, OSC, V, WS, WTU; 9; 1997-2018)
Petasites frigidus (EWU, HJAEF, HJAEFB, HOYT, HPSU, HSC, ID, IDS, LINF, OR, OSC, PSM, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 211; 1881-2020)
var. frigidus (HPSU, OR, OSC, WS, WTU; 7; 1927-2019)
var. palmatus (EWU, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, OSC, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 170; 1881-2006)
Petasites frigidus var. palmatus × Petasites sagittatus (WS; 1; 1884)
var. sagittatus (WCW, WS; 2; 1919-1964)
Petasites hybridus (WS; 1; 1904)
Petasites japonicus (HOYT, HPSU, OSC, WTU; 6; 2013-2019)
Pleiacanthus spinosus (CIC, ID, OSC, SOC, SRP, UBC, VALE, WS, WTU; 82; 1896-2014)
Prenanthella exigua (CIC, OSC; 2; 2002)
Psathyrotes annua (SOC; 1; ?)
Pseudognaphalium californicum (ID, OSC, SRP, WS, WTU; 28; 1913-2004)
Pseudognaphalium canescens (OSC; 1; 2012)
Pseudognaphalium luteoalbum (HOYT, HPSU, ID, OSC, SRP, UAAH, WS, WTU; 26; 1898-2019)
Pseudognaphalium macounii (OSC, WS; 5; 1884-1968)
Pseudognaphalium microcephalum (HPSU, ID, MONT, REED, RM, SRP, UBC, WS, WTU; 39; 1910-2002)
Pseudognaphalium stramineum (HPSU, ID, OSC, RM, SOC, SRP, WS, WTU; 82; 1876-2019)
Pseudognaphalium thermale (CIC, HJAEF, HJAEFB, HPSU, ID, OSC, SOC, SRP, UAAH, WS, WTU; 83; 1880-2014)
Psilocarphus brevissimus (BBLM, BOIS, CIC, ID, OSC, RM, SOC, SRP, VALE, WS, WTU; 73; 1881-2009)
var. brevissimus (CIC, OSC, RM, SOC, SRP, VALE, WS, WTU; 55; 1881-2009)
Psilocarphus elatior (CIC, HPSU, ID, OSC, RM, SOC, SRP, UBC, WS, WTU; 92; 1881-2014)
Psilocarphus oregonus (BBLM, CIC, HPSU, ID, OSC, RM, SOC, VALE, WS, WTU; 48; 1871-2011)
Psilocarphus tenellus (HPSU, ID, OSC, SRP, WS, WTU; 31; 1887-2019)
Ptilonella scabra (WTU; 2; 1922-1986)
Ptilophora major (NY; 1; ?)
Ptiloria exigua (WCW; 1; 1935)
Pyrrocoma brachycephala (NY, RM, WS; 3; 1901)
Pyrrocoma carthamoides (BLMVL, CIC, HPSU, ID, OSC, PSM, RM, SOC, SRP, VALE, WS, WTU; 133; 1881-2018)
var. carthamoides (BLMVL, CIC, ID, OSC, RM, VALE, WS, WTU; 26; 1881-2004)
var. cusickii (BLMVL, CIC, ID, OSC, RM, SOC, SRP, VALE, WS, WTU; 101; 1887-2018)
Pyrrocoma cuspidata (NY, RM, WS; 3; 1901)
Pyrrocoma duriuscula (WS; 1; 1897)
Pyrrocoma erythropappa (NY; 1; ?)
Pyrrocoma halophila (NY, RM; 2; 1901)
Pyrrocoma hirta (HPSU, ID, IDS, NY, OSC, RM, SOC, SRP, WCW, WS, WTU; 81; 1882-2019)
var. hirta (ID, OSC, RM, SRP, WS, WTU; 16; 1882-2015)
var. lanulosa (IDS, NY, OSC, WS, WTU; 18; 1894-2010)
var. sonchifolia (ID, RM, SRP, WTU; 8; 2002-2019)
Pyrrocoma lanceolata (CIC, HPSU, ID, IDE, OSC, SOC, SRP, VALE, WCW, WS, WTU; 172; 1885-2013)
var. lanceolata (CIC, HPSU, ID, IDE, OSC, VALE, WCW, WS, WTU; 62; 1898-2013)
Pyrrocoma linearis (CIC; 10; 1992-2009)
Pyrrocoma racemosa (BLMMD, BLMVL, ID, NY, OSC, WS, WTU; 56; 1882-2004)
var. congesta (BLMMD, NY, OSC, WS, WTU; 24; 1887-1990)
var. paniculata (OSC, WS; 13; 1882-2004)
var. racemosa (OSC, WS, WTU; 12; 1902-2002)
var. virgata (WTU; 3; 1927-1935)
Pyrrocoma radiata (BBLM, BLMVL, BOIS, CIC, ID, OSC, SRP, VALE, WS, WTU; 59; 1910-1998)
Pyrrocoma scaberula (BLMVL, OSC, SRP; 3; 2005-2011)
Pyrrocoma turbinella (NY, RM, WS; 3; 1901)
Pyrrocoma uniflora (HPSU, OSC, SOC, VALE, WS, WTU; 26; 1885-2009)
var. howellii (OSC; 3; 1885)
var. uniflora (OSC, SOC, VALE, WS, WTU; 19; 1885-2009)
Rafinesquia californica (OSC; 3; 1998-2000)
Raillardella argentea (CIC, ID, MONT, OSC, SOC, SRP, UBC, WS, WTU; 64; 1896-2017)
Raillardella scaposa (ID, OSC, WTU; 8; 1926-2012)
Rainiera stricta (HJAEF, HJAEFB, HPSU, ID, OSC, SOC, UBC, WS, WTU; 50; 1920-2010)
Ratibida columnifera (WS; 2; 1909)
Rhaponticum repens (CIC, HPSU, ID, LEA, LINF, NY, OSC, UBC, VALE, WCW, WS, WTU, WWB; 45; 1927-2009)
Rigiopappus leptocladus (CIC, HPSU, ID, IDS, OSC, SOC, SRP, VALE, WS, WTU; 83; 1878-2016)
Rudbeckia alpicola (OSC; 6; 1925-1986)
Rudbeckia californica (ID, WS, WTU; 14; 1884-1973)
Rudbeckia fulgida (ID; 1; 1948)
var. umbrosa (ID; 1; 1948)
Rudbeckia glaucescens (BLMMD, HSC, OSC, SOC, UBC, WTU; 40; 1884-2013)
Rudbeckia hirta (OSC, SOC; 3; 1903-1973)
var. pulcherrima (OSC; 1; 1903)
Rudbeckia laciniata (HPSU; 1; 1909)
Rudbeckia occidentalis (BLMVL, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, OSC, REED, RM, SOC, SRP, UBC, WCW, WS, WTU; 156; 1882-2018)
Saussurea americana (HPSU, ID, IDS, OSC, RM, SOC, SRP, UBC, WS, WTU; 49; 1896-2015)
Scorzonella bolanderi (WTU; 2; 1927-1931)
Senecio ×albescens (WTU; 1; 2010)
Senecio aronicoides (HPSU, OSC; 3; 1913-1973)
Senecio bloomeri (OSC, WTU; 2; 1998)
var. nudatus (OSC, WTU; 2; 1998)
Senecio crassulus (CIC, ID, OSC, REED, RM, SRP, VALE, WS, WTU; 79; 1910-2018)
Senecio ertterae (CIC, COLO, ID, IDS, NY, OSC, VALE, WS, WTU; 42; 1974-2013)
Senecio fremontii (CIC, HPSU, ID, IDS, OSC, PSM, SOC, SRP, WS, WTU; 108; 1882-2009)
var. fremontii (CIC, ID, OSC, SOC, WS, WTU; 71; 1882-2002)
var. occidentalis (WS, WTU; 4; 1883-1931)
Senecio howellii (NY, REED; 2; 1906)
var. lithophilus (NY, REED; 2; 1906)
Senecio hydrophiloides (CIC, HPSU, ID, NY, OSC, SOC, SRP, UBC, WCW, WS, WTU; 94; 1887-2013)
Senecio hydrophilus (CIC, HPSU, ID, LEA, OSC, RM, SOC, SRP, UBC, VALE, WS, WTU; 91; 1882-2013)
Senecio integerrimus (BLMMD, BLMVL, CIC, DPP, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LINF, MONT, OSC, PSM, REED, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 621; 1881-2017)
var. exaltatus (BLMMD, BLMVL, CIC, HJAEF, HJAEFB, HPSU, ID, IDS, MONT, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 460; 1881-2017)
var. integerrimus (UBC; 1; 1954)
var. major (HSC, OSC, SOC, WS; 13; 1913-2001)
var. ochroleucus (HPSU, MONT, OSC, SRP, WS, WTU; 66; 1886-1980)
Senecio integrifolius (WTU; 1; 1955)
var. exaltatus (WTU; 1; 1955)
Senecio jacobaean (LINF; 1; 1994)
Senecio mikanoides (SRP; 1; 1998)
Senecio serra (BLMVL, CIC, EWU, HPSU, ID, OSC, PSM, RM, SOC, SRP, VALE, WCW, WS, WTU; 156; 1881-2017)
var. serra (CIC, ID, OSC, RM, SOC, VALE, WS, WTU; 87; 1881-2017)
Senecio sphaerocephalus (OSC, SRP, WCW, WS, WTU; 12; 1900-2002)
Senecio streptanthifolia (WTU; 1; 1938)
Senecio subvestitus (NY; 1; 1887)
Senecio sylvaticus (HJAEFB, HPSU, HSC, ID, LINF, OSC, SOC, SRP, WS, WTU; 86; 1909-2018)
Senecio triangularis (BLMMD, CIC, HJAEF, HJAEFB, HPSU, HSC, ID, IDS, LEA, MONT, OSC, REED, RM, SOC, SRP, UBC, WCW, WS, WTU, WWB; 352; 1880-2018)
var. triangularis (HJAEF, HJAEFB, ID, OSC, SOC, SRP, WTU; 172; 1880-2008)
Senecio viscosus (WS, WTU; 4; 1910-1911)
Senecio vulgaris (CIC, HJAEFB, HPSU, ID, LINF, MONT, OSC, REED, SOC, SRP, UBC, WCW, WS, WTU; 114; 1880-2009)
Sericocarpus oregonensis (BLMMD, HJAEFB, HPSU, ID, IDS, JWT, OSC, SOC, UBC, WS, WTU; 54; 1885-2015)
ssp. oregonensis (HPSU, JWT, OSC, SOC, WS, WTU; 40; 1885-2010)
Sericocarpus rigidus (HPSU, ID, OSC, WS, WTU; 9; 1881-1998)
Sigesbeckia orientalis (WS; 1; 1900)
Silybum marianum (HPSU, ID, OSC, SOC, SRP, UBC, WS, WTU; 50; 1886-2014)
Solidago altissima (WS; 1; 1903)
ssp. gilvocanescens (WS; 1; 1903)
Solidago canadensis (BOIS, EWU, HPSU, ID, LINF, OSC, RM, SOC, VALE, WCW, WS, WTU; 25; 1936-2014)
Solidago curtisii (WS; 3; 1901-1949)
Solidago elongata (EWU, HPSU, MONT, OSC, REED, SOC, SRP, UBC, WS, WTU; 230; 1875-2016)
Solidago gigantea (CIC, HPSU, ID, OSC, PSM, REED, RM, SRP, VALE, WS, WTU; 54; 1880-2018)
Solidago glutinosa (WTU; 4; 1905-1931)
var. bellidifolia (WTU; 1; 1927)
var. glutinosa (WTU; 3; 1905-1931)
Solidago lepida (BOIS, CIC, HJAEF, HJAEFB, HPSU, ID, MONT, OSC, REED, RM, SRP, UBC, VALE, WCW, WS, WTU; 219; 1875-2019)
var. lepida (CIC, OSC, SRP, VALE, WTU; 77; 1885-2018)
var. salebrosa (BOIS, CIC, HJAEF, HJAEFB, HPSU, ID, MONT, OSC, REED, RM, SRP, UBC, VALE, WCW, WS, WTU; 137; 1875-2019)
Solidago missouriensis (CIC, HPSU, ID, OSC, RM, VALE, WCW, WS, WTU; 103; 1888-2015)
Solidago multiradiata (BLMVL, CIC, HPSU, ID, LINF, NY, OSC, REED, SRP, WS, WTU; 124; 1894-2018)
Solidago rigida (REED, WTU; 4; 1908)
ssp. glabrata (REED, WTU; 4; 1908)
Solidago simplex (HPSU, ID, OSC, REED, WS, WTU; 54; 1881-2008)
var. nana (HPSU, ID, OSC, REED, WS, WTU; 35; 1882-2008)
var. simplex (HPSU, OSC, WS; 16; 1881-1969)
Solidago spathulata (HPSU, OSC, SOC, WTU; 36; 1887-2011)
Solidago spectabilis (ID, OSC, SOC, WTU; 13; 1901-1998)
Solidago velutina (ID, OSC, SOC, WS, WTU; 34; 1887-2006)
ssp. californica (ID, OSC, SOC, WS, WTU; 11; 1887-1988)
Soliva sessilis (ID, OSC, SRP, WS, WTU; 37; 1884-2017)
Sonchus arvensis (EWU, HPSU, OSC, SRP, WS, WTU; 27; 1939-2019)
ssp. arvensis (OSC; 2; 1941-1980)
ssp. uliginosus (HPSU, OSC, WS, WTU; 17; 1939-2019)
Sonchus asper (CIC, HJAEFB, HPSU, ID, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU; 87; 1881-2019)
Sonchus oleraceus (CIC, HPSU, ID, LINF, OSC, REED, SOC, SRP, UAAH, WS, WTU; 55; 1900-2006)
Stenotus acaulis (CIC, EWU, HPSU, ID, IDS, OSC, SOC, SRP, VALE, WCW, WS, WTU; 82; 1898-2015)
Stenotus lanuginosus (CIC, HPSU, ID, MONT, OSC, RM, SRP, V, VALE, WCW, WS, WTU, WWB; 110; 1885-2018)
var. lanuginosus (CIC, HPSU, ID, MONT, OSC, RM, SRP, V, VALE, WS, WTU; 87; 1885-2018)
Stephanomeria elata (HPSU, OSC, SRP, WTU; 14; 1887-1991)
Stephanomeria exigua (CIC, HPSU, IDS, OSC, PSM, VALE, WS, WTU; 81; 1896-2006)
ssp. coronaria (CIC, OSC; 39; 1896-2005)
ssp. exigua (WS; 1; 1898)
Stephanomeria lactucina (ID, OSC, SOC, WS, WTU; 34; 1920-2008)
Stephanomeria malheurensis (NY, OSC; 3; 1972-1975)
Stephanomeria paniculata (CIC, HPSU, OSC, UBC, VALE, WS, WTU; 37; 1871-2019)
Stephanomeria pauciflora (SOC, SRP; 2; 1929-2017)
Stephanomeria tenuifolia (CIC, HPSU, ID, IDS, OSC, PSM, SOC, UBC, VALE, WS, WTU; 134; 1882-2009)
Stephanomeria virgata (ID, OSC, SOC, WS, WTU; 19; 1909-2009)
ssp. pleurocarpa (OSC, SOC, WS; 14; 1909-2009)
Stylocline psilocarphoides (NY, OSC; 4; 1896-1943)
Symphyotrichum ascendens (CIC, EWU, HPSU, ID, MONT, OSC, RM, SRP, VALE, WS, WTU; 156; 1892-2018)
Symphyotrichum boreale (ID; 1; 1991)
Symphyotrichum bracteolatum (BOIS, CIC, ID, IDS, LINF, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU; 206; 1882-2019)
Symphyotrichum campestre (CIC, OSC, SOC, SRP, VALE, WCW, WS, WTU; 79; 1894-2013)
Symphyotrichum chilense (BLMMD, BOIS, CIC, HPSU, HSC, IDS, OSC, SOC, SRP, WTU; 70; 1886-2007)
Symphyotrichum ciliatum (OSC; 2; 2002-2010)
Symphyotrichum ericoides (OSC, WS, WTU; 18; 1885-1937)
var. ericoides (WTU; 3; 1909-1936)
var. pansum (OSC, WS; 15; 1885-1937)
Symphyotrichum falcatum (MONT, REED; 2; 1909-1917)
Symphyotrichum foliaceum (CIC, EWU, HPSU, HSC, ID, NY, OSC, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU, WWB; 382; 1882-2018)
var. parryi (CIC; 1; 1992)
Symphyotrichum frondosum (CIC, HPSU, OSC, SOC, VALE, WS, WTU; 73; 1881-2009)
Symphyotrichum hallii (CIC, HPSU, NY, OSC, SRP, UBC, WS, WTU; 136; 1880-2019)
Symphyotrichum laeve (OSC; 1; 1947)
var. geyeri (OSC; 1; 1947)
Symphyotrichum lanceolatum (CIC, ID, OSC, SOC, VALE, WTU; 23; 1936-2019)
var. hesperium (CIC, ID, OSC, SOC, VALE, WTU; 22; 1936-2019)
var. lanceolatum (OSC; 1; 1983)
Symphyotrichum lentum (WTU; 1; 1917)
Symphyotrichum novae-angliae (OSC, SOC, SRP; 7; 1958-2009)
Symphyotrichum spathulatum (BLMMD, CIC, HJAEF, HPSU, HSC, ID, IDS, MONT, OSC, REED, RM, SOC, SRP, UBC, VALE, WS, WTU, WWB; 402; 1882-2018)
Symphyotrichum subspicatum (BLMMD, CIC, HOYT, HPSU, ID, LINF, OSC, SOC, SRP, UBC, WCW, WS, WTU; 216; 1877-2017)
Tanacetum balsamita (HPSU, OSC, WS, WTU; 14; 1920-1955)
Tanacetum bipinnatum (HPSU, ID, OSC, SOC, SRP, WS, WTU; 96; 1881-2014)
Tanacetum parthenium (CIC, HPSU, ID, OSC, SOC, SRP, WS, WTU; 28; 1900-2014)
Tanacetum vulgare (BLMVL, HPSU, ID, MONT, OSC, REED, RM, SOC, SRP, UBC, WS, WTU; 51; 1896-2015)
Taraxacum ceratophorum (OSC; 1; 1933)
Taraxacum erythrospermum (CIC, HPSU, OSC, PSM, RM, VALE, WS, WTU; 30; 1904-2002)
Taraxacum officinale (CIC, EWU, HJAEF, HJAEFB, HPSU, ID, IDS, LINF, OSC, PSM, REED, RM, SOC, SRP, VALE, WCW, WS, WTU; 158; 1880-2018)
ssp. officinale (PSM; 1; 1970)
Tetradymia canescens (BLMVL, CIC, HPSU, ID, IDS, LEA, OSC, PSM, REED, SOC, SRP, UBC, VALE, WS, WTU; 179; 1881-2009)
Tetradymia canescens × Tetradymia glabrata (WTU; 2; 1927-1955)
Tetradymia glabrata (BBLM-OWY, BOIS, CIC, HPSU, ID, IDS, LEA, NY, OSC, SOC, SRP, UBC, VALE, WS, WTU, WWB; 103; 1885-2017)
Tetradymia spinosa (CIC, HPSU, ID, IDE, LEA, LINF, OSC, UBC, VALE, WS, WTU; 59; 1885-2007)
Thelesperma megapotamicum (BLMVL, VALE; 2; 1997)
Tonestus lyallii (ID, OSC, REED, SRP, WS, WTU; 39; 1860-1997)
Townsendia florifer (BLMVL, CIC, HPSU, ID, IDE, IDS, OSC, PSM, SOC, SRP, UBC, WS, WTU, WWB; 190; 1881-2014)
var. watsoni (WTU; 2; 1955)
Townsendia montana (ID, OSC, WCW, WS, WTU; 15; 1899-1990)
Townsendia parryi (OSC, WS; 3; 1899-1990)
Townsendia scapigera (CIC, OSC, VALE; 11; 1976-2008)
Tragopogon dubius (BLMMD, CIC, HOYT, HPSU, NY, OSC, PSM, RM, SOC, SRP, UBC, VALE, WCW, WS, WTU; 129; 1905-2018)
Tragopogon mirus (OSC; 3; 2006-2008)
Tragopogon paradoxus (HPSU; 1; 1974)
Tragopogon porrifolius (HPSU, LINF, OSC, REED, SOC, SRP, UBC, WS, WTU; 48; 1886-2018)
Tragopogon pratensis (HPSU, OSC, PLU, WS, WTU; 10; 1916-1971)
Tripleurospermum inodorum (OSC, RM, WS; 20; 1902-2009)
Tripleurospermum maritimum (RM, WCW, WTU; 4; 1910-1982)
ssp. maritimum (RM, WTU; 3; 1910-1982)
Troximon glaucum (WTU; 1; 1885)
var. lanceolatum (WTU; 1; 1885)
Troximon heterophyllum (WCW; 1; 1898)
Tussilago farfara (WTU; 1; 1997)
Uropappus lindleyi (BLMVL, CIC, HPSU, ID, OSC, SOC, SRP, UBC, VALE, WS, WTU; 54; 1882-2010)
Vesicarpa potentilloides (UBC; 1; 2010)
ssp. nitrophilum (UBC; 1; 2010)
Wyethia amplexicaulis (CIC, HPSU, ID, OSC, RM, SRP, UBC, VALE, WCW, WS, WTU; 98; 1885-2012)
Wyethia amplexicaulis × Wyethia helianthoides (WS, WTU; 19; 1912-1945)
Wyethia angustifolia (BLMMD, HPSU, ID, LINF, OSC, SOC, SRP, UBC, WS, WTU; 145; 1880-2010)
Wyethia ×cusickii (OSC, WS; 11; 1912-1950)
Wyethia glabra (IDS, SRP; 2; 2016)
Wyethia helenioides (BLMMD, VALE; 2; 1965-2002)
Wyethia helianthoides (BLMVL, CIC, HPSU, ID, OSC, RM, SRP, UBC, VALE, WCW, WS, WTU; 85; 1885-2012)
Wyethia mollis (HPSU, ID, IDS, OSC, SOC, SRP, UBC, WCW, WS, WTU; 39; 1894-2016)
Xanthium affine (WTU; 1; 1922)
Xanthium spinosum (CIC, OSC, SOC, UBC, VALE, WS, WTU; 46; 1882-2012)
Xanthium strumarium (CIC, HPSU, ID, OSC, SOC, SRP, UBC, VALE, WCW, WS, WTU; 97; 1879-2019)