Vascular Plants of the Pacific Northwest
Poaceae
Poaceae
Generated from PNW Herbaria database
November 28, 2020.
175 genus names
1,170 species/infraspecies names
(names highlighted in brown could not be resolved to an accepted name)
Index to Genera:
A: Achnatherum, Acnatherum, Aegilops, Aegilotriticum, Agroelymus, Agropogon, Agropyron, Agrostis, Aira, Alopecuris, Alopecurus, Amelichloa, Ammophila, Andropogon, Anthoxanthum, Apera, Arctagrostis, Arctophila, Arctopoa, Aristida, Arrhenatherum, Arundo, Avena, Avenella, Avenula
B: Beckmannia, Blepharidachne, Bothriochloa, Bouteloua, Brachyelytrum, Brachypodium, Briza, Bromopsis, Bromus
C: Calamagrostis, Calamovilfa, Calotheca, Capillare, Catabrosa, Cenchrus, Chasmanthium, Chloris, Cinna, Cladoraphis, Coleanthus, Coleataenia, Cortaderia, Corynephorus, Crypsis, Cynodon, Cynosurus
D: Dactylis, Danthonia, Dasyochloa, Deschampsia, Desmazeria, Dichanthelium, Digitaria, Diplachne, Distichlis, Duarctopoa, Dupontia
E: Echinochloa, Ehrharta, Eleusine, Elyhordeum, Elyleymus, Elymordeum, Elymus, Elytrigia, Eragrostis, Eremopyrum, Eriochloa
I: Imperata
O: Oryzopsis
P: Panicum, Pappostipa, Parapholia, Parapholis, Parodiella, Pascopyrum, Paspalum, Pennisetum, Phalaris, Phippsia, Phleum, Phragmites, Phyllostachys, Piptatheropsis, Pleuropogon, Poa, Podagrostis, Polypogon, Polytrias, Psathyrostachys, Pseudelymus, Pseudoroegnaria, Pseudoroegneria, Pseudosasa, Ptilagrostis, Puccinellia
S: Saccharum, Sasa, Schedolium, Schedonnardus, Schedonorus, Schizachne, Schizachyrium, Sclerochloa, Scleropoa, Scolochloa, Scribneria, Secale, Setaria, Sitanion, Sorghum, Spartina, Sphenopholis, Sporobolus, Stipa
T: Taeniatherum, Teaniatherum, Thinopyrum, Thynopyrum, Torreyochloa, Tridens, Tripidium, Triplasis, Tripogon, Trisetum, Triticosecale, Triticum
U: Urochloa
Achnatherum ×bloomeri (ID, MT, OR; 25; 1932-2006)
Achnatherum contractum (MT, WA; 6; 1921-2008)
Achnatherum hendersonii (OR, WA; 54; 1892-2013)
Achnatherum hymenoides (BC, ID, MT, OR, WA, YK; 938; 1881-2019)
Achnatherum lemmonii (BC, ID, MT, OR, WA; 625; 1882-2020)
ssp. lemmonii (BC, ID, MT, OR, WA; 304; 1882-2020)
ssp. lemmonnii (WA; 1; 2010)
ssp. pubescens (OR, WA; 24; 1883-2000)
var. lemmonnii (WA; 2; 2006)
Achnatherum lettermanii (BC, ID, MT, OR, WA; 219; 1885-2020)
Achnatherum nelsonii (BC, ID, MT, OR, WA, YK; 1280; 1883-2020)
ssp. dorei (BC, ID, MT, OR, WA, YK; 727; 1884-2020)
ssp. nelsonii (BC, ID, MT, OR, WA; 296; 1883-2020)
Achnatherum nevadense (ID, MT, OR; 25; 1908-2019)
Achnatherum occidentale (BC, ID, MT, OR, WA; 787; 1880-2020)
ssp. californicum (ID, OR, WA; 147; 1884-2020)
ssp. occidentale (ID, MT, OR, WA; 119; 1882-2017)
ssp. pubescens (BC, ID, MT, OR, WA; 263; 1880-2019)
Achnatherum pinetorum (ID, MT, OR; 42; 1911-2016)
Achnatherum richardsonii (BC, ID, MT, OR, WA, YK; 252; 1887-2011)
Achnatherum robustum (MT, OR, WA; 6; 1898-2007)
Achnatherum swallenii (ID; 42; 1941-2009)
Achnatherum thurberianum (BC, ID, MT, OR, WA; 458; 1884-2019)
Achnatherum wallowaense (OR; 29; 1916-2013)
Achnatherum webberi (ID, OR, WA; 71; 1934-2013)
Acnatherum lemmonii (OR; 1; 2005)
var. lemmonii (OR; 1; 2005)
Acnatherum occidentalis (ID, WA; 2; 1996-2015)
var. occidentalis (ID, WA; 2; 1996-2015)
Acnatherum thurberianum (OR; 1; 1993)
Aegilops bicornis (WA; 1; 1931)
Aegilops comosa (OR; 4; 1997)
Aegilops cylindrica (BC, ID, MT, OR, WA; 127; 1917-2019)
Aegilops neglecta (OR; 4; 1997-1998)
Aegilops speltoides (OR; 3; 1997)
var. ligustica (OR; 1; 1997)
Aegilops tauschii (BC; 1; 1987)
Aegilops triuncialis (OR; 6; 1994-2007)
Aegilops umbellata (OR; 2; 1997)
Aegilops umbellulata (OR; 1; 1997)
×Aegilotriticum sancti-andreae (OR; 3; 1979-1993)
×Agroelymus hultenii (AK; 1; 1938)
×Agropogon lutosus (OR; 4; 1919-1968)
Agropyron alba (WA; 1; 1992)
Agropyron caninum (WA; 4; 1940-1996)
ssp. trachycaulis (WA; 4; 1940-1996)
Agropyron caninum var. tenerum × Elymus elymoides (WA; 1; 1962)
Agropyron cristatum (AK, BC, ID, MT, OR, WA, YK; 669; 1898-2019)
var. cristatum (ID, MT; 79; 1991-2011)
Agropyron desertorum (BC; 2; 1974-1980)
ssp. desertorum (BC; 2; 1974-1980)
Agropyron divergens (WA; 1; 1893)
var. inermis (WA; 1; 1893)
Agropyron fragile (AK, BC, ID, MT, OR, WA; 32; 1941-2019)
ssp. fragile (BC, WA; 5; 1971-1978)
Agropyron glaucum × Agropyron spicatum (WA; 1; 1906)
Agropyron latiglume × Agropyron scribneri (MT; 1; 1963)
Agropyron lutosus (OR, WA; 3; 1897-1902)
Agropyron pauciflorum × Agropyron subsecundum (ID; 1; 1944)
Agropyron scribneri (OR; 2; 1944-1953)
var. flexuosum (OR; 2; 1944-1953)
Agropyron scribneri × Agropyron violaceum (ID; 1; 1944)
Agropyron spicatum × Sitanion hystrix (ID; 1; 1963)
Agropyron trachycaulus (BC; 1; 1978)
ssp. subsecundus (BC; 1; 1978)
Agrostis alba (AK, BC, ID, MT, OR, WA; 207; 1884-2003)
var. alba (BC, ID, OR, WA; 26; 1940-2002)
Agrostis bakeri × Agrostis idahoensis (ID; 1; 1944)
Agrostis canina (AK, BC, ID, OR; 13; 1881-2013)
Agrostis capillaris (AK, BC, ID, MT, OR, WA, YK; 417; 1888-2020)
Agrostis castellana (BC, OR, WA; 32; 1921-2013)
Agrostis clavata (AK; 3; 1980-1999)
Agrostis densiflora (OR, WA; 10; 1902-2013)
Agrostis exarata (AK, BC, ID, MT, OR, WA, YK; 2096; 1875-2020)
var. ampla (OR, WA; 29; 1877-1965)
var. asperifolia (WA; 2; 1892)
var. monlepis (OR; 1; 1983)
Agrostis gigantea (AK, BC, ID, MT, OR, WA, YK; 538; 1887-2020)
var. palustris (BC; 1; 1990)
var. stolonifera (ID; 1; 1963)
Agrostis hallii (OR, WA; 58; 1882-2012)
Agrostis hendersonii (OR; 1; 1930)
Agrostis howellii (OR, WA; 23; 1882-2013)
Agrostis hyemalis (BC, ID, MT, OR, WA; 35; 1891-2008)
Agrostis idahoensis (BC, ID, MT, OR, WA; 265; 1883-2020)
var. idahoensis (WA; 1; 2006)
Agrostis idahoensis × Agrostis scabra (WA; 1; 1955)
Agrostis idahoensis × Agrostis variabilis (WA; 3; 1890)
Agrostis kudoi (AK; 3; 1993)
Agrostis mertensii (AK, BC, MT, WA, YK; 209; 1920-2017)
var. borealis (AK; 1; 1980)
Agrostis microphylla (BC, ID, OR, WA; 100; 1880-2017)
Agrostis ×murbeckii (OR, WA; 2; 2007)
Agrostis nebulosa (OR; 1; 1903)
Agrostis oregonensis (BC, ID, MT, OR, WA; 170; 1881-2019)
Agrostis oregonensis × Agrostis scabra (WA; 1; 1910)
Agrostis pallens (AK, BC, ID, MT, OR, WA; 369; 1881-2018)
Agrostis perennans (BC, WA; 5; 1884-1977)
Agrostis rossae (ID, OR, WA; 12; 1907-1940)
Agrostis rossiae (ID, MT, WA; 11; 1922-2016)
Agrostis scabra (AK, BC, ID, MT, OR, WA, YK; 2259; 1881-2020)
ssp. scabra (YK; 1; 2002)
Agrostis scabra × Agrostis oregonensis (WA; 2; 1893-1900)
Agrostis stolonifera (AK, BC, ID, MT, OR, WA, YK; 1424; 1874-2019)
var. majus (BC; 1; 1987)
Agrostis variabilis (BC, ID, MT, OR, WA; 502; 1877-2020)
Agrostis vinealis (AK; 26; 1965-2013)
Aira caryophyllea (BC, ID, OR, WA; 572; 1881-2020)
var. caryophyllea (BC, ID, OR, WA; 132; 1881-2020)
Aira elegans (OR; 11; 1906-2007)
Aira praecox (BC, OR, WA, YK; 406; 1889-2019)
Alopecuris magellanicus (MT; 28; 1897-2011)
Alopecurus aequalis (AK, BC, ID, MT, OR, WA, YK; 1263; 1880-2020)
var. aequalis (BC, ID, MT, OR, WA, YK; 281; 1880-2020)
Alopecurus alpinus (AK; 1; 1975)
var. alpinus (AK; 1; 1975)
Alopecurus arundinaceus (AK, BC, ID, MT, OR, WA; 64; 1961-2017)
Alopecurus carolinianus (BC, ID, MT, OR, WA; 112; 1888-2013)
Alopecurus geniculatus (AK, BC, ID, MT, OR, WA; 401; 1880-2018)
var. geniculatus (ID, WA; 3; 1999-2000)
Alopecurus magellanicus (AK, BC, ID, MT, WA, YK; 317; 1889-2018)
Alopecurus myosuroides (BC, ID, OR, WA; 49; 1900-2005)
Alopecurus pratensis (AK, BC, ID, MT, OR, WA, YK; 488; 1700-2020)
Alopecurus saccatus (OR, WA; 51; 1881-2019)
Amelichloa caudata (OR; 1; 1915)
Ammophila arenaria (BC, OR, WA; 105; 1914-2019)
ssp. arenaria (OR, WA; 35; 1914-2019)
Ammophila breviligulata (BC, OR, WA; 11; 1929-2019)
ssp. breviligulata (OR, WA; 6; 1929-2019)
Andropogon gerardii (MT; 104; 1890-2018)
ssp. hallii (MT; 18; 1937-2011)
Anthoxanthum arcticum (AK, YK; 71; 1926-2018)
Anthoxanthum aristatum (BC, ID, OR, WA; 40; 1911-2016)
ssp. aristatum (OR, WA; 8; 1912-2013)
Anthoxanthum nitens (BC, ID; 2; 1992-1997)
Anthoxanthum odoratum (AK, BC, ID, MT, OR, WA, YK; 425; 1889-2020)
Apera interrupta (BC, ID, MT, OR, WA; 317; 1918-2020)
Apera spica-venti (BC, ID, OR, WA; 18; 1902-2002)
Arctagrostis latifolia (AK, BC, YK; 676; 1899-2019)
ssp. arundinacea (AK, BC, YK; 119; 1899-2015)
ssp. latifolia (AK, BC, YK; 28; 1960-2019)
Arctophila fulva (AK, BC, YK; 270; 1923-2020)
Arctopoa eminens (AK, BC; 201; 1917-2014)
Aristida adscensionis (ID; 1; 1937)
Aristida basiramea (ID; 1; 2020)
Aristida dichotoma (BC; 1; ?)
Aristida oligantha (BC, ID, OR; 38; 1887-2014)
Aristida purpurea (BC, ID, MT, OR, WA; 322; 1887-2017)
var. fendleriana (ID, MT; 21; 1899-2008)
var. longiseta (BC, ID, MT, OR, WA; 245; 1887-2017)
var. nealleyi (ID; 1; 1978)
var. parishii (BC; 1; 1968)
Arrhenatherum elatius (AK, BC, ID, MT, OR, WA; 332; 1882-2020)
ssp. bulbosum (BC, OR, WA; 16; 1926-2000)
ssp. elatius (BC, ID, MT, OR, WA; 86; 1882-2018)
Arundo donax (OR; 9; 2013-2017)
Avena barbata (BC, ID, OR, WA; 34; 1883-2017)
Avena fatua (AK, BC, ID, MT, OR, WA, YK; 275; 1879-2019)
var. glabrescens (WA; 1; 1902)
Avena pubiscens (WA; 1; 1937)
Avena sativa (AK, BC, ID, MT, OR, WA, YK; 75; 1890-2019)
Avenella flexuosa (AK, BC; 6; 1938-2010)
Avenula hookeri (BC, MT, YK; 121; 1887-2016)
Beckmannia erucaeformis (MT, WA; 6; 1892-1992)
Beckmannia eruciformis (AK; 1; 1992)
ssp. borealis (AK; 1; 1992)
Beckmannia syzigachne (AK, BC, ID, MT, OR, WA, YK; 789; 1877-2019)
Blepharidachne kingii (ID; 4; 1995)
Bothriochloa barbinodis (ID; 1; 1994)
Bothriochloa ischaemum (MT; 1; 1997)
Bothriochloa laguroides (ID; 4; 1989-2008)
Bothriochloa saccharoides (ID; 3; 1987)
Bouteloua barbata (MT; 2; 1941)
Bouteloua curtipendula (BC, MT; 87; 1890-2018)
var. curtipendula (MT; 32; 1942-2010)
Bouteloua dactyloides (ID, MT, WA; 79; 1903-2011)
Bouteloua gracilis (BC, ID, MT, WA; 298; 1890-2015)
Bouteloua hirsuta (MT; 3; 1986-2009)
var. hirsuta (MT; 2; 2007-2009)
Brachyelytrum aristosum (BC; 1; 1975)
Brachypodium distachyon (OR; 2; 1902)
Brachypodium pinnatum (OR; 1; 1949)
Brachypodium sylvaticum (BC, OR, WA; 67; 1939-2019)
ssp. sylvaticum (BC; 1; 2010)
Briza maxima (BC, OR, WA; 56; 1948-2019)
Briza media (OR; 2; 2013)
Briza minor (BC, ID, OR, WA; 131; 1884-2019)
Bromopsis pumpelliana (AK; 8; 2005-2015)
ssp. pumpelliana (AK; 6; 2006-2015)
var. arctica (AK; 2; 2005-2006)
Bromus anomalus (BC, ID, MT, OR, WA; 93; 1886-2016)
Bromus arenarius (OR, WA; 11; 1908-2018)
Bromus arvensis (ID, OR; 18; 1930-2014)
Bromus berteroanus (OR, WA; 2; 1902-1977)
Bromus biebersteinii (MT; 1; 1980)
Bromus brachyphullus (OR; 1; 1901)
Bromus briziformis (BC, ID, MT, OR, WA; 447; 1884-2020)
Bromus catharticus (ID, OR; 30; 1902-2012)
var. cartharticus (ID; 1; 2009)
var. catharticus (ID, OR; 16; 1902-2012)
var. elatus (OR; 3; 1905-1910)
Bromus cebadilla (OR; 1; 2003)
Bromus ciliatus (AK, BC, ID, MT, OR, WA, YK; 505; 1885-2019)
Bromus commutatus (BC, ID, MT, OR, WA; 481; 1882-2020)
ssp. commutatus (BC; 1; 1940)
Bromus commutatus × Bromus hordeaceus (WA; 1; 1892)
Bromus diandrus (BC, ID, MT, OR, WA; 371; 1890-2019)
Bromus erectus (ID, WA; 10; 1936-2011)
Bromus eximius (WA; 1; 1893)
var. umbraticus (WA; 1; 1893)
Bromus hordeaceus (AK, BC, ID, MT, OR, WA; 961; 1882-2020)
var. glabrescens (OR; 2; 1908)
var. hordeaceus (OR; 1; 2008)
Bromus inermis (AK, BC, ID, MT, OR, WA, YK; 1150; 1805-2020)
Bromus japonicus (BC, ID, MT, OR, WA; 607; 1853-2019)
Bromus laevipes (OR, WA; 37; 1887-2019)
Bromus lanceolatus (BC; 1; 2007)
Bromus latiglumis (BC; 2; 2008)
Bromus madritensis (OR, WA; 7; 1898-2012)
Bromus orcuttianus (BC, ID, OR, WA; 70; 1884-2013)
Bromus pacificus (AK, BC, OR, WA; 167; 1899-2016)
Bromus porteri (BC, ID, MT, OR, WA; 163; 1889-2011)
Bromus ×pseudothominii (ID, WA; 2; 1953-1963)
Bromus pubescens (MT; 4; 1920-2007)
Bromus pumpellianus (AK, BC, ID, MT, OR, WA, YK; 526; 1800-2020)
ssp. dicksonii (AK; 3; 1957-1983)
ssp. pumpellianus (AK, BC, ID, MT, WA, YK; 84; 1884-2020)
var. lanata (MT; 2; 1895)
Bromus racemosus (BC, ID, MT, OR, WA; 140; 1874-2018)
Bromus ramosus (ID; 2; 1939-1951)
Bromus richardsonii (AK, BC, MT, YK; 97; 1897-2011)
Bromus riparius (BC, ID; 4; 2002-2011)
Bromus rubens (ID, MT, OR, WA; 74; 1894-2018)
Bromus scoparius (ID; 1; 1951)
Bromus secalinus (BC, ID, MT, OR, WA; 135; 1884-2019)
Bromus sitchensis (AK, BC, ID, MT, OR, WA, YK; 2920; 1882-2020)
var. aleutensis (AK, BC, WA; 74; 1895-2019)
var. carinatus (BC, ID, MT, OR, WA; 1619; 1882-2019)
var. marginatus (BC, ID, MT, OR, WA, YK; 833; 1884-2020)
var. maritimus (ID, MT, OR, WA; 28; 1893-2010)
var. polyanthus (BC, ID, OR, WA; 52; 1902-2016)
var. sitchensis (AK, BC, OR, WA; 47; 1889-2019)
Bromus squarrosus (BC, ID, MT, OR, WA; 152; 1922-2020)
var. villosus (BC, WA; 11; 1947-2015)
Bromus sterilis (BC, ID, OR, WA; 312; 1904-2019)
Bromus subuliflora (WA; 1; 1999)
Bromus suksdorfii (ID, MT, OR, WA; 100; 1883-2018)
Bromus suksdorfii × Bromus vulgaris (OR; 1; 1928)
Bromus tectorum (AK, BC, ID, MT, OR, WA; 2028; 1882-2020)
f. tectorum (BC; 4; 1904-1979)
Bromus tenerum (WA; 1; 1919)
Bromus vulagris (ID; 1; 1949)
Bromus vulgaris (BC, ID, MT, OR, WA; 933; 1881-2020)
Calamagrostis ×acutiflora (WA; 1; 2008)
Calamagrostis breweri (OR; 12; 1916-2019)
Calamagrostis canadensis (AK, BC, ID, MT, OR, WA, YK; 2526; 1875-2020)
var. canadensis (AK, BC, ID, MT, OR, WA, YK; 642; 1877-2020)
var. langsdorffii (AK, BC, ID, MT, OR, WA, YK; 574; 1875-2020)
Calamagrostis deacon (WA; 2; 1892)
var. robusta (WA; 2; 1892)
Calamagrostis deschampsioides (AK, YK; 108; 1926-2017)
Calamagrostis epigeios (BC, ID; 10; 1941-2011)
Calamagrostis howellii (OR, WA; 56; 1881-2013)
Calamagrostis koelerioides (ID, MT, OR, WA; 40; 1887-2010)
Calamagrostis lapponica (AK, BC, WA, YK; 193; 1893-2019)
var. canadensis (BC; 1; 1981)
Calamagrostis mansfieldii (OR; 1; 2005)
Calamagrostis montanensis (BC, ID, MT, WA; 157; 1883-2016)
Calamagrostis neglecta (AK, YK; 13; 1995-2003)
ssp. eglecta (AK; 4; 1996-2003)
Calamagrostis nutkaensis (AK, BC, OR, WA; 344; 1882-2019)
Calamagrostis preslii (AK; 1; 1969)
Calamagrostis purpurascens (AK, BC, ID, MT, OR, WA, YK; 900; 1886-2020)
Calamagrostis rigescens (WA; 1; 1937)
Calamagrostis rubescens (BC, ID, MT, OR, WA; 779; 1853-2019)
Calamagrostis scopulorum (MT; 9; 1957-2011)
Calamagrostis scribneri (MT; 1; 1931)
var. dubia (MT; 1; 1931)
Calamagrostis sesquiflora (AK, BC, MT; 40; 1935-2009)
Calamagrostis stricta (AK, BC, ID, MT, OR, WA, YK; 1001; 1880-2020)
ssp. crassiglumis (BC; 1; 1972)
ssp. groenlandica (AK, YK; 30; 1949-2006)
ssp. inexpansa (AK, BC, ID, MT, OR, WA, YK; 626; 1880-2020)
ssp. stricta (AK, BC, ID, MT, OR, WA, YK; 112; 1885-2020)
var. canadensis (BC; 1; 1974)
var. inexpansa (BC, ID, MT, WA; 8; 1884-2004)
Calamagrostis suksdorfii (ID; 1; 1892)
var. luxuriana (ID; 1; 1892)
Calamagrostis tacomensis (AK, BC, OR, WA; 69; 1886-2017)
Calamagrostis tenuis (AK; 3; 1992-1993)
Calamagrostis tweedyi (ID, MT, OR, WA; 55; 1937-2012)
Calamagrostis utsutsuensis (OR; 15; 1959-2012)
Calamovilfa gigantea (WA; 3; 1937-1993)
Calamovilfa longifolia (BC, MT, WA; 224; 1886-2017)
var. longifolia (BC, MT, WA; 83; 1981-2011)
Calotheca brizoides (WA; 1; 1894)
Capillare capillare (WA; 1; 1980)
ssp. capillare (WA; 1; 1980)
Catabrosa aquatica (AK, ID, MT, OR; 210; 1887-2018)
ssp. aquatica (ID, MT; 2; 1992-1997)
Cenchrus biflorus (WA; 2; 1937-1963)
Cenchrus compressus (BC; 1; 2006)
Cenchrus incertus (ID; 1; 1931)
Cenchrus longispinus (BC, ID, MT, OR, WA; 97; 1916-2019)
Cenchrus orientalis (OR, WA; 2; 2014-2019)
Cenchrus spinifex (ID, MT, OR, WA; 12; 1926-1998)
Cenchrus tribuloides (MT; 1; ?)
Chasmanthium latifolium (WA; 1; 1959)
Chloris radiata (OR; 1; 1915)
Chloris verticillata (ID, MT, OR; 12; 1994-2017)
Cinna latifolia (AK, BC, ID, MT, OR, WA, YK; 693; 1881-2020)
Cladoraphis cyperoides (OR; 2; 1915)
Coleanthus subtilis (BC, OR, WA; 33; 1880-2014)
Coleataenia longifolia (BC, ID, OR; 16; 1966-2020)
ssp. rigidula (BC, ID, OR; 16; 1966-2020)
Cortaderia jubata (OR, WA; 18; 1959-2016)
Cortaderia selloana (BC, OR, WA; 51; 1953-2020)
Corynephorus canescens (BC, WA; 10; 1938-2016)
Crypsis alopecuroides (BC, ID, MT, OR, WA; 158; 1926-2019)
Crypsis schoenoides (ID, OR; 17; 1961-2016)
Crypsis vaginiflora (ID, OR, WA; 15; 1976-2016)
Cynodon dactylon (BC, ID, MT, OR, WA; 102; 1897-2019)
var. dactylon (OR; 6; 1900-2003)
Cynodon ×magennisii (OR; 1; 2008)
Cynosurus cristata (WA; 1; 2017)
Cynosurus cristatus (BC, ID, MT, OR, WA; 131; 1903-2018)
Cynosurus echinatus (BC, ID, OR, WA; 224; 1919-2020)
Dactylis glomerata (AK, BC, ID, MT, OR, WA, YK; 1109; 1882-2020)
Danthonia californica (BC, ID, MT, OR, WA; 746; 1881-2020)
ssp. americana (WA; 1; 1889)
var. macounii (BC; 2; 1990)
Danthonia compressa (WA; 1; 1926)
Danthonia decumbens (OR, WA; 16; 1962-2013)
Danthonia elongata (MT; 1; 2004)
Danthonia intermedia (AK, BC, ID, MT, OR, WA, YK; 1052; 1884-2020)
ssp. intermedia (OR; 4; 1978)
Danthonia parryi (MT; 9; 1932-1998)
Danthonia spicata (AK, BC, ID, MT, OR, WA, YK; 343; 1890-2020)
Danthonia unispicata (BC, ID, MT, OR, WA; 543; 1886-2020)
Dasyochloa pulchella (ID; 1; 1942)
Deschampsia alpina (AK; 1; 1968)
Deschampsia atropurpurea (BC; 2; 1979)
ssp. latifolia (BC; 2; 1979)
Deschampsia brevifolia (AK, YK; 60; 1944-2019)
Deschampsia caespitosa (AK, BC, WA, YK; 19; 1961-2012)
ssp. cespitosa (BC; 2; 2009-2012)
var. holciformis (WA; 2; 1963)
Deschampsia cespitosa (AK, BC, ID, MT, OR, WA, YK; 2432; 1875-2020)
Deschampsia danthonioides (BC, ID, MT, OR, WA; 573; 1881-2020)
Deschampsia elongata (AK, BC, ID, MT, OR, WA, YK; 1105; 1877-2019)
Deschampsia sukatschewii (AK, ID, OR, YK; 46; 1922-2019)
Desmazeria acutiflora (OR; 1; 1902)
Dichanthelium aciculare (ID; 1; 1959)
Dichanthelium acuminatum (BC, ID, MT, OR, WA; 533; 1881-2019)
ssp. acuminatum (BC, ID, MT, OR, WA; 114; 1892-2017)
ssp. fasciculatum (BC, ID, MT, OR, WA; 327; 1881-2019)
ssp. lindheimeri (WA; 1; 1905)
ssp. sericeum (ID, MT; 9; 1887-2017)
ssp. thermale (BC, ID; 10; 1941-1964)
Dichanthelium acuminatus (BC; 1; 1963)
var. fasciculatum (BC; 1; 1963)
Dichanthelium commutatum (OR; 1; 2011)
var. commutatum (OR; 1; 2011)
Dichanthelium dichotomum (ID; 1; 2003)
Dichanthelium latifolium (WA; 1; 1922)
Dichanthelium oligosanthes (BC, ID, MT, OR, WA; 278; 1880-2019)
ssp. scribnerianum (BC, ID, MT, OR, WA; 245; 1880-2019)
Dichanthelium scabriusculum (WA; 1; 1981)
Dichanthelium scoparium (MT; 1; 2016)
Dichanthelium wilcoxianum (MT; 7; 1977-2017)
Digitaria ciliaris (BC; 1; 1989)
Digitaria ischaemum (BC, ID, MT, OR, WA; 90; 1891-2020)
Digitaria sanguinalis (BC, ID, MT, OR, WA; 240; 1885-2020)
Digitaria villosa (OR; 1; 1900)
Diplachne fusca (BC, ID, MT, OR, WA; 89; 1887-2017)
ssp. fascicularis (BC, ID, MT, OR, WA; 82; 1924-2017)
ssp. uninervia (BC, OR, WA; 6; 1887-2002)
Distichlis spicata (BC, ID, MT, OR, WA; 727; 1863-2018)
var. dentata (WA; 1; 1971)
×Duarctopoa labradorica (AK; 10; 1992-2004)
Dupontia fisheri (AK, YK; 217; 1700-2019)
Echinochloa colona (OR, WA; 5; 1900-2008)
Echinochloa crus-galli (AK, BC, ID, MT, OR, WA; 588; 1882-2019)
Echinochloa crus-gallii (WA; 2; 1958-2001)
Echinochloa crus-pavonis (OR, WA; 9; 1900-1967)
var. crus-pavonis (OR, WA; 6; 1947-1967)
var. macera (OR; 2; 1913-1917)
Echinochloa muricata (BC, ID, MT, OR, WA; 160; 1882-2019)
var. microstachya (BC, ID, MT, OR, WA; 145; 1882-2019)
var. microstachys (BC; 1; 2013)
var. muricata (WA; 1; 1894)
Ehrharta erecta (BC, OR; 3; 1982-1997)
Eleusine coracana (WA; 2; 1897)
Eleusine indica (BC, MT, OR; 5; 1900-2008)
Eleusine tristachya (OR, WA; 6; 1898-1915)
×Elyhordeum jordalii (AK; 1; 1949)
×Elyhordeum macounii (AK, BC, ID, MT, OR, WA, YK; 105; 1891-2014)
×Elyhordeum montanense (ID; 1; 1934)
×Elyhordeum pilosilemma (AK; 2; 1963-1964)
×Elyhordeum schaackianum (BC; 2; 1964)
×Elyhordeum stebbinsianum (BC, OR; 18; 1902-2007)
×Elyleymus aristatus (OR, WA; 50; 1901-1957)
×Elyleymus colvillensis (BC; 1; 2015)
×Elyleymus hirtiflorus (BC, ID; 3; 1938-2008)
×Elyleymus jamesensis (BC; 1; 1915)
×Elyleymus mossii (BC; 1; 2015)
×Elyleymus ontariensis (BC; 5; 1947-2001)
×Elyleymus ucluetensis (BC; 1; 1958)
×Elymordeum macounii (BC, YK; 4; 1947-2001)
Elymus alaskanus (AK, BC, YK; 265; 1928-2019)
ssp. alaskanus (AK, BC, YK; 121; 1928-2019)
ssp. hyperarcticus (AK, YK; 66; 1941-2014)
var. latiglume (BC; 5; 1956-2008)
Elymus albicans (BC, ID, MT, OR, WA; 65; 1887-2016)
Elymus aristatus × Elymus macounii (MT; 1; 1955)
Elymus bakeri (ID, MT; 6; 1901-1953)
Elymus canadensis (BC, ID, MT, OR, WA; 367; 1887-2020)
var. brachystachys (BC; 1; 1976)
var. canadensis (BC, ID, MT, OR, WA; 139; 1889-2020)
var. robustus (ID, MT; 2; 1978)
Elymus canadensis × Elymus glaucus (OR, WA; 2; 1892-1914)
Elymus caninus (BC, ID, MT, OR, WA, YK; 66; 1893-2003)
Elymus cinereus × Elymus elymoides (ID; 1; 1984)
Elymus curvatus (BC, MT, WA; 8; 1898-2010)
Elymus dahuricus (BC; 1; 2014)
Elymus elymoides (BC, ID, MT, OR, WA; 1904; 1882-2020)
ssp. brevifolius (BC, ID, MT, OR, WA; 172; 1890-2019)
ssp. elymoides (BC, ID, MT, OR, WA; 607; 1884-2020)
ssp. hordeoides (ID, OR, WA; 82; 1889-2018)
var. elymoides (ID, MT, OR, WA; 127; 1904-2011)
Elymus elymoides × Elymus latiglume (MT; 1; 1947)
Elymus elymoides × Elymus scribneri (ID; 4; 1977-1992)
Elymus elymoides × Elymus spicatus (ID; 2; 1921-1984)
Elymus elymoides × Elymus trachycaulus (ID; 1; 1974)
Elymus elymoides × Pseudoroegneria spicata (ID; 1; 2005)
Elymus giganteus (ID; 1; 2004)
var. cinereus (ID; 1; 2004)
Elymus glaucus (AK, BC, ID, MT, OR, WA, YK; 2202; 1875-2020)
ssp. glaucus (AK, BC, ID, MT, OR, WA, YK; 1255; 1875-2020)
ssp. virescens (AK, BC, ID, OR, WA; 76; 1893-2019)
Elymus glaucus × Elymus hirsutus (ID; 1; 2020)
Elymus glaucus × Elymus lanceolatus (ID; 1; 2013)
Elymus glaucus × Elymus latiglumis (WA; 1; 1930)
Elymus glaucus × Elymus trachycaulis (MT; 1; 1921)
Elymus glaucus × Hordeum nodosum (WA; 1; 1905)
Elymus glaucus × Pseudoroegneria (ID; 2; 1992)
Elymus glaucus × Sitanion (WA; 3; 1902-1905)
Elymus glaucus × Sitanion hystrix (WA; 1; 1923)
Elymus glaucus × Sitanion hystrix var. californicum (WA; 1; 1890)
Elymus ×hansenii (BC, ID, MT, OR, WA; 86; 1886-1995)
Elymus hirsutus (AK, BC, ID, OR, WA; 154; 1900-2020)
Elymus hispidus (ID, MT; 55; 1984-2011)
var. hispidus (ID, MT; 55; 1984-2011)
Elymus hoffmannii (BC; 1; 2002)
Elymus hystrix (WA; 2; 1898-2002)
var. californican (WA; 1; 1898)
Elymus lanceolata (ID, OR; 6; 1999-2013)
ssp. riparius (ID, OR; 6; 1999-2013)
Elymus lanceolatus (AK, BC, ID, MT, OR, WA, YK; 786; 1885-2020)
ssp. lanceolatus (BC, ID, MT, OR, WA; 347; 1886-2019)
ssp. psammophilus (AK, BC, ID, OR, WA, YK; 73; 1886-2018)
ssp. riparius (BC, ID, MT, OR, WA; 147; 1885-2020)
var. lanceolatus (ID, MT, OR, WA; 90; 1895-2011)
Elymus lanceolatus × Elymus spicatus (ID; 3; 1975-1995)
Elymus lanceolatus × Elymus trachycaulus (ID; 1; 1989)
Elymus macrourus (AK, MT, YK; 104; 1901-2019)
Elymus multisetus (ID, OR, WA; 180; 1890-2012)
Elymus ×palmerensis (AK; 3; 1947-1949)
Elymus ×pseudorepens (ID, MT; 8; 1897-2015)
Elymus repens (AK, BC, ID, MT, OR, WA, YK; 698; 1882-2019)
Elymus ×saundersii (BC, ID, MT, OR; 9; 1886-2011)
Elymus ×saxicolus (MT; 3; 1965-2008)
Elymus scribneri (BC, ID, MT, OR, WA; 203; 1883-2016)
Elymus semicostatus (AK, ID, OR, WA; 7; 1899-1941)
Elymus sibiricus (AK, BC, MT, WA, YK; 65; 1700-2016)
Elymus sierrae (OR; 1; 1938)
Elymus spicata (BC; 3; 1948-1991)
ssp. inermis (BC; 3; 1948-1991)
Elymus spicatum (BC; 1; 1975)
var. inerme (BC; 1; 1975)
Elymus trachycaulus (AK, BC, ID, MT, OR, WA, YK; 2227; 1700-2019)
ssp. majus (BC; 1; 1976)
ssp. subsecundus (AK, BC, ID, MT, OR, WA, YK; 256; 1883-2017)
ssp. trachycaulus (AK, BC, ID, MT, OR, WA, YK; 1305; 1700-2019)
Elymus trachycaulus × Elymus scribneri (AK, BC, ID, MT, OR, WA, YK; 49; 1901-2003)
Elymus trachycaulus × Hordeum jubatum (ID, WA; 11; 1937-1967)
Elymus tsukushiensis (OR; 4; 1900-1903)
Elymus villosus (MT; 3; 2001-2009)
Elymus violaceus (AK, BC, ID, MT, OR, WA, YK; 527; 1700-2017)
Elymus virginicus (BC, ID, MT, WA; 41; 1888-2016)
ssp. submuticus (BC; 1; 1944)
var. jejunus (MT; 12; 1953-2010)
Elymus wawawaiensis (ID, OR, WA; 10; 1933-2019)
Elymus ×yukonensis (AK, BC, YK; 14; 1909-2005)
Elytrigia intermedia × Elytrigia repens (ID; 1; 1941)
Elytrigia repens (BC; 1; 1976)
f. aristata (BC; 1; 1976)
Eragrostis barrelieri (ID; 2; 1984-1985)
Eragrostis cilianensis (BC, ID, MT, OR, WA; 246; 1887-2020)
Eragrostis curvula (OR, WA; 38; 1990-2019)
Eragrostis frankii (OR; 1; 1925)
Eragrostis hypnoides (ID, MT, OR, WA; 125; 1878-2019)
Eragrostis japonica (YK; 1; 1943)
Eragrostis lutescens (ID, OR, WA; 13; 1896-2018)
Eragrostis mexicana (BC, ID, OR, WA; 58; 1897-2019)
ssp. mexicana (BC, ID, WA; 5; 1897-2016)
ssp. virescens (BC, ID, OR, WA; 49; 1915-2019)
Eragrostis minor (BC, ID, MT, OR, WA; 115; 1922-2019)
Eragrostis pectinacea (BC, ID, MT, OR, WA; 295; 1894-2020)
var. miserrima (OR; 1; 2003)
var. pectinacea (BC, ID, MT, OR, WA; 143; 1894-2020)
Eragrostis pilosa (BC, ID, OR, WA; 41; 1900-2020)
var. pilosa (ID, OR, WA; 16; 1900-2020)
Eragrostis reptans (WA; 1; 1894)
Eragrostis tef (BC, ID, MT; 13; 1990-2016)
Eragrostis trichodes (ID, WA; 3; 1897-1966)
Eragrostis unioloides (MT; 1; ?)
Eremopyrum orientale (BC; 3; 1995-2006)
Eremopyrum triticeum (BC, ID, MT, OR, WA; 157; 1912-2019)
Eriochloa michauxii (MT; 2; 1970)
Eriochloa polystachya (WA; 1; 1913)
Fargesia spathacea (WA; 1; 2007)
Festuca actoflora (WA; 3; 1976)
Festuca altaica (AK, BC, ID, YK; 638; 1926-2019)
Festuca ammobia (BC, OR; 33; 1926-2018)
Festuca arizonica (AK, ID; 2; 1945-1950)
Festuca auriculata (AK, YK; 8; 1960-2005)
Festuca baffinensis (AK, BC, ID, MT, YK; 228; 1897-2019)
Festuca brachyphylla (AK, BC, ID, MT, OR, WA, YK; 912; 1882-2019)
ssp. brachyphylla (ID, OR, WA, YK; 48; 1882-2016)
ssp. breviculmis (OR; 2; 1974-1980)
ssp. coloradensis (MT, OR, WA; 37; 1899-2008)
Festuca brevissima (AK, YK; 129; 1956-2015)
Festuca californica (OR; 90; 1886-2018)
ssp. californica (OR; 49; 1886-2002)
Festuca campestris (BC, ID, MT, OR, WA; 269; 1884-2019)
Festuca dasyclada (OR; 1; 1961)
Festuca doreana (ID, MT, WA; 12; 1921-1978)
var. doreana (ID, MT; 6; 1934-1978)
Festuca edlundiae (AK; 3; 2002)
Festuca elmeri (MT, OR, WA; 15; 1882-2012)
Festuca filiformis (BC, OR, WA; 20; 1921-2017)
Festuca hallii (BC, MT; 4; 1917-2011)
Festuca heterophylla (BC; 3; 1997-2013)
Festuca hyperbore (AK; 2; 1968)
Festuca idahoensis (BC, ID, MT, OR, WA; 2152; 1881-2020)
Festuca lemanii (OR; 1; 2018)
Festuca lenensis (AK, YK; 72; 1939-2013)
Festuca minutiflora (AK, BC, ID, MT, YK; 64; 1890-2014)
Festuca occidentalis (AK, BC, ID, MT, OR, WA; 933; 1881-2020)
Festuca ovina (AK, BC, ID, MT, OR, WA, YK; 144; 1882-2016)
ssp. eu-ovina (ID; 1; 1938)
ssp. ingrata (ID; 1; 1991)
ssp. rydbergii (BC; 1; 1990)
var. sulcata (WA; 1; 1894)
Festuca paradoxa (OR; 1; 2004)
Festuca prolifera (BC; 3; 1980-1992)
Festuca pseudovivipara (BC; 3; 1957-1980)
Festuca roemeri (BC, OR, WA; 309; 1881-2019)
var. klamathensis (OR; 69; 1899-2000)
var. roemeri (OR, WA; 86; 1881-2019)
Festuca rubra (AK, BC, ID, MT, OR, WA, YK; 2307; 1800-2020)
f. glabra (BC; 1; 1984)
ssp. arctica (AK, BC, YK; 258; 1800-2019)
ssp. arenaria (AK, BC, MT, OR, YK; 31; 1935-2007)
ssp. aucta (AK, BC; 26; 1932-2013)
ssp. commutata (AK, BC, ID, OR, WA, YK; 19; 1964-2019)
ssp. fallax (BC, OR, WA, YK; 11; 1916-2010)
ssp. juncea (AK, BC, OR, WA; 89; 1882-2019)
ssp. mediana (BC, OR, WA; 63; 1882-2006)
ssp. rubra (AK, BC, ID, MT, OR, WA; 275; 1882-2018)
ssp. secunda (BC, OR, WA; 10; 1972-1994)
ssp. trichophylla (OR; 2; 1994-1995)
ssp. vallicola (BC, ID, MT, OR, WA; 22; 1894-1994)
var. arenicola (OR; 1; 2009)
var. barbata (AK; 1; 1932)
var. commutata (OR, WA; 42; 1942-2006)
var. flora (OR; 1; 1914)
var. glaucescens (OR; 1; 1900)
var. saxiruimfaun (WA; 1; 1897)
var. subillosa (YK; 1; 1920)
var. subvillosa (AK; 1; 1922)
Festuca saximontana (AK, BC, ID, MT, OR, WA, YK; 547; 1881-2020)
var. purpusiana (BC, ID, MT, OR, WA, YK; 183; 1881-2020)
var. robertsiana (BC, ID; 4; 1972-2004)
var. saximontana (AK, BC, ID, MT, OR, WA, YK; 205; 1883-2015)
Festuca scabrella (BC, ID, MT, OR, WA; 224; 1890-2011)
Festuca sciura (ID; 1; 1941)
Festuca subulata (AK, BC, ID, MT, OR, WA; 359; 1882-2020)
Festuca subuliflora (BC, ID, OR, WA; 168; 1890-2019)
Festuca thurberi (ID; 3; 2016)
Festuca trachyphylla (BC, ID, OR, WA, YK; 59; 1939-2020)
Festuca valesiaca (ID, OR, WA; 31; 1994-2020)
Festuca viridula (BC, ID, MT, OR, WA; 505; 1882-2020)
Festuca vivipara (AK, MT, YK; 20; 1960-2004)
Festuca viviparoidea (AK, BC, MT, YK; 82; 1936-2017)
ssp. krajinae (BC; 5; 1982-2001)
ssp. viviparoidea (AK; 2; 2017)
Festuca washingtonica (BC, WA; 47; 1932-2005)
Gastridium phleoides (OR; 70; 1887-2013)
Glyceria alnasteretum (AK; 2; 1945)
Glyceria borealis (AK, BC, ID, MT, OR, WA, YK; 539; 1884-2020)
Glyceria canadensis (BC, OR, WA; 23; 1929-2013)
var. canadensis (OR; 2; 1929-1999)
Glyceria declinata (BC, OR, WA; 42; 1964-2018)
Glyceria elata (BC, ID, MT, OR, WA; 830; 1807-2020)
var. swallen (BC; 1; 1941)
Glyceria elata × Glyceria grandis (BC; 1; 1940)
Glyceria fluitans (BC, OR, WA; 29; 1885-2008)
Glyceria gracilis (YK; 1; ?)
Glyceria grandis (AK, BC, ID, MT, OR, WA, YK; 612; 1882-2020)
var. grandis (AK, BC, ID, MT, OR, WA, YK; 78; 1883-2020)
Glyceria leptostachya (AK, BC, ID, OR, WA; 140; 1883-2019)
Glyceria maxima (AK, BC, MT, WA, YK; 40; 1937-2013)
Glyceria nervata (OR; 1; 1924)
var. elata (OR; 1; 1924)
Glyceria ×occidentalis (BC, ID, OR, WA; 110; 1882-2020)
Glyceria pauciflora (OR; 1; 1907)
var. holmii (OR; 1; 1907)
Glyceria pulchella (AK, BC, YK; 58; 1899-2013)
Glyceria striata (AK, BC, ID, MT, OR, WA, YK; 852; 1881-2020)
Gnomonia cerastis (BC; 1; 2009)
Gnomonia potentillae (BC; 1; 1952)
Gnomonia setacea (BC; 1; 1952)
Gnomonia veneta (BC, OR; 3; 1916-1934)
Graphephorum wolfii (BC, ID, MT, OR, WA; 228; 1882-2018)
Hainardia cylindrica (OR; 3; 2005)
Hesperostipa comata (BC, ID, MT, OR, WA, YK; 1041; 1881-2020)
ssp. comata (BC, ID, MT, OR, WA, YK; 550; 1881-2019)
ssp. intermedia (BC, ID, MT, OR, WA; 49; 1897-2008)
Hesperostipa curtiseta (BC, MT; 62; 1892-2011)
Hesperostipa spartea (BC, MT, OR, WA; 34; 1908-2011)
Hierochloe alpina (AK, BC, ID, MT, WA, YK; 592; 1700-2018)
var. alpina (AK, BC, ID, MT, WA, YK; 105; 1931-2018)
var. orthantha (BC; 6; 1982)
Hierochloe annulata (AK; 2; 1993)
Hierochloe occidentalis (OR, WA; 86; 1875-2019)
Hierochloe odorata (AK, BC, ID, MT, OR, WA, YK; 533; 1800-2019)
Hilaria mutica (WA; 1; 1897)
Holcus lanatus (AK, BC, ID, MT, OR, WA, YK; 711; 1882-2016)
var. albovirens (BC; 2; 1894)
var. colorata (BC; 3; 1915-1937)
Holcus mollis (BC, ID, OR, WA; 63; 1921-2020)
ssp. mollis (WA; 1; 2007)
Hordeum brachyantherum (AK, BC, ID, MT, OR, WA, YK; 1023; 1875-2020)
ssp. brachyantherum (AK, BC, ID, OR, WA; 131; 1875-2020)
ssp. californicum (ID, OR, WA; 10; 1898-1980)
var. boreale (BC; 2; 1934-1949)
Hordeum brachyantherum × Hordeum jubatum (AK, ID; 2; 1963-1980)
Hordeum bulbosum (BC, ID, WA; 3; 1897-1953)
var. brachyantherum (BC; 1; 1953)
Hordeum congesta (OR; 1; 1980)
Hordeum depressum (BC, ID, OR, WA; 20; 1892-2018)
Hordeum discolor (BC, WA; 12; 1950-1994)
Hordeum filipes (OR; 1; 1985)
Hordeum intermedium × Hordeum jubatum (BC; 5; 1942-1979)
Hordeum jubatum (AK, BC, ID, MT, OR, WA, YK; 1202; 1884-2020)
ssp. intermedium (AK, BC, ID, MT, OR, WA; 124; 1886-2017)
ssp. jubatum (BC, ID, MT, OR, WA, YK; 324; 1884-2019)
Hordeum marinum (BC, ID, MT, OR, WA; 219; 1884-2019)
ssp. gussoneanum (BC, ID, MT, OR, WA; 197; 1884-2019)
Hordeum murinum (BC, ID, MT, OR, WA; 473; 1883-2019)
ssp. glaucum (BC, ID, OR, WA; 118; 1887-2011)
ssp. leporinum (BC, ID, MT, OR, WA; 115; 1883-2016)
ssp. murinujm (BC; 1; 2008)
ssp. murinum (BC, ID, OR, WA; 61; 1897-2019)
Hordeum pusillum (BC, ID, MT, OR, WA; 55; 1892-2011)
Hordeum secalinum (OR; 1; 1928)
Hordeum vulgare (AK, BC, ID, MT, OR, WA; 96; 1889-2018)
ssp. vulgare (BC; 1; 1971)
var. vulgare (MT; 1; 2010)
Horedum brachyantherum (BC, MT; 2; 1965-1968)
Imperata ovata (OR; 1; 1899)
Koeleria asiatica (AK, YK; 72; 1956-2018)
Koeleria cristatum (BC; 1; 1965)
Koeleria gracilis (BC, ID; 3; 1896-1978)
f. pubiculmis (BC; 1; 1978)
f. subglabra (BC; 1; 1978)
ssp. idahoensis (ID; 1; 1896)
Koeleria macrantha (AK, BC, ID, MT, OR, WA, YK; 2281; 1876-2020)
Koeleria macratha (BC; 1; 1970)
Koleria macrantha (ID; 1; 1994)
Lagurus ovatus (OR; 1; 2018)
Leersia oryzoides (BC, ID, MT, OR, WA; 172; 1889-2020)
Leucopoa kingii (ID, MT, OR; 335; 1885-2020)
×Leydeum dutillyanum (AK; 4; 1964)
Leymus ambiguus (ID; 7; 1948-2002)
Leymus angustus (YK; 6; 1998-2013)
Leymus arenarius (AK, BC, ID, WA; 7; 1939-2009)
Leymus chinensis (ID; 1; 1942)
Leymus cinereus (BC, ID, MT, OR, WA; 777; 1880-2019)
var. cinereus (WA; 2; 1983-1992)
Leymus condensatus (BC, ID, MT, OR, WA; 51; 1887-2019)
Leymus elymoides (WA; 1; 1965)
Leymus flavescens (ID, MT, OR, WA; 144; 1881-2017)
Leymus flavescens × Leymus triticoides (OR; 1; 2011)
Leymus innovatus (AK, BC, ID, MT, OR, WA, YK; 305; 1886-2017)
ssp. innovatus (BC; 1; 1992)
ssp. velutinus (AK; 14; 1957-2016)
var. innovatus (BC; 1; 1977)
Leymus mollis (AK, BC, MT, OR, WA, YK; 521; 1882-2019)
ssp. mollis (AK, BC, MT, OR, WA, YK; 141; 1882-2019)
ssp. villosissimus (AK, BC, YK; 51; 1949-2017)
Leymus multicaulis (OR; 1; 2002)
Leymus ×multiflorus (MT, OR; 7; 1956-2017)
Leymus racemosus (ID, MT, OR, WA; 27; 1950-2020)
ssp. racemosus (ID; 1; 1988)
Leymus salina (ID, OR; 57; 1941-2019)
ssp. salina (ID; 3; 2010)
ssp. salmonis (ID, OR; 35; 1941-2019)
var. salmonis (ID; 1; 1962)
Leymus simplex (ID; 3; 1934-1935)
Leymus triticoides (BC, ID, MT, OR, WA; 299; 1875-2019)
var. triticoides (ID; 1; 2009)
Leymus ×vancouverensis (BC, OR, WA; 54; 1889-2007)
Lolium ×hybridum (BC; 1; 2007)
Lolium multiflorum (AK, BC, ID, MT, OR, WA, YK; 295; 1882-2018)
Lolium perenne (AK, BC, ID, MT, OR, WA, YK; 376; 1885-2020)
Lolium persicum (BC, MT; 29; 1954-2013)
Lolium rigidum (OR, WA; 4; 1902-1939)
Lolium temulentum (BC, ID, MT, OR, WA; 47; 1884-2018)
ssp. temulentum (BC, OR, WA; 26; 1887-2018)
Melica aristata (OR, WA; 23; 1883-2013)
Melica bulbosa (BC, ID, MT, OR, WA; 651; 1881-2020)
Melica bulbosa × Melica fugax (ID; 1; 1947)
Melica californica (ID; 1; 1977)
Melica ciliata (WA; 3; 2004)
ssp. taurica (WA; 2; 2004)
Melica fugax (BC, ID, OR, WA; 178; 1881-2020)
Melica geyeri (OR, WA; 61; 1884-2017)
var. geyeri (OR; 36; 1884-2017)
Melica harfordii (BC, ID, OR, WA; 210; 1881-2019)
Melica smithii (BC, ID, MT, OR, WA; 76; 1892-2018)
Melica spectabilis (BC, ID, MT, OR, WA; 547; 1883-2020)
Melica stricta (ID, OR, WA; 40; 1885-2016)
var. stricta (OR; 16; 1885-2013)
Melica subulata (AK, BC, ID, MT, OR, WA; 759; 1877-2020)
Melinis repens (ID, OR; 3; 1976-2005)
Milium effusum (WA; 1; 2000)
Milium vernale (ID; 77; 1987-1989)
Miscanthus sinensis (BC, OR, WA; 11; 2004-2018)
Molineriella laevis (MT, OR, WA; 30; 1913-2009)
Molinia caerulea (BC, OR; 10; 1962-2019)
Muhlenbergia andina (BC, ID, MT, OR, WA; 45; 1879-2010)
Muhlenbergia asperifolia (BC, ID, MT, OR, WA; 338; 1881-2019)
var. parodi (ID; 1; 1939)
Muhlenbergia cuspidata (MT; 70; 1886-2010)
Muhlenbergia filiculmis (ID; 1; 1923)
Muhlenbergia filiformis (BC, ID, MT, OR, WA; 361; 1881-2020)
Muhlenbergia glomerata (BC, ID, MT, OR, WA, YK; 107; 1887-2015)
Muhlenbergia mexicana (BC, ID, MT, OR, WA; 90; 1889-2019)
ssp. virescens (BC; 1; 1998)
var. filiformis (ID, OR; 12; 1935-2019)
var. mexicana (BC, OR, WA; 11; 1889-2014)
Muhlenbergia minutissima (ID, MT, OR, WA; 24; 1882-1997)
Muhlenbergia montana (MT; 1; ?)
Muhlenbergia racemosa (BC, ID, MT, WA; 48; 1887-2010)
Muhlenbergia richardsonis (BC, ID, MT, OR, WA, YK; 471; 1882-2019)
Muhlenbergia rigens (OR; 1; 2005)
Muhlenbergia schreberi (WA; 2; 1897)
Muhlenbergia tacemosa (MT; 1; 1892)
Muhlenbergia uniflora (BC, OR; 7; 1997-2002)
Munroa squarrosa (ID, MT, OR; 52; 1891-2013)
Nardus stricta (ID, OR; 26; 1960-2015)
Nassella lepida (OR; 1; 1995)
Nassella tenuissima (BC, OR, WA; 13; 2007-2017)
Nassella viridula (BC, ID, MT, OR, WA; 352; 1887-2019)
Nicoraepoa chonotica (ID, WA; 2; 1882-1890)
Not onagraceae (OR; 1; 1930)
Oryzopsis asperifolia (BC, ID, MT, WA, YK; 171; 1892-2020)
Oryzopsis hendersonii × Stipa lemmonii (WA; 1; 1967)
Panicum acuminatum (OR; 1; 1999)
ssp. acuminatum (OR; 1; 1999)
Panicum capillare (BC, ID, MT, OR, WA; 627; 1881-2020)
ssp. capillare (BC, ID, MT, OR, WA; 240; 1881-2020)
Panicum dichotomiflorum (BC, ID, MT, OR, WA; 110; 1940-2020)
ssp. dichotomiflorum (BC, ID, OR, WA; 47; 1940-2020)
Panicum lanuginosum (MT; 1; 1964)
var. sericeum (MT; 1; 1964)
Panicum miliaceum (BC, ID, MT, OR, WA; 151; 1894-2019)
ssp. miliaceum (OR, WA; 26; 1917-2019)
ssp. ruderale (BC, OR, WA; 22; 1993-2015)
Panicum occidenatle (WA; 1; 1984)
Panicum philadelphicum (BC; 1; 1944)
Panicum virgatum (ID, MT, OR; 44; 1901-2019)
var. aridum (MT; 1; 1903)
Pappostipa speciosa (OR; 6; 1985-2014)
Parapholia incurva (WA; 1; 2004)
Parapholis incurva (BC, OR, WA; 25; 1906-2018)
Parodiella fruticola (MT; 6; 1888)
Pascopyrum smithii (BC, ID, MT, OR, WA; 647; 1885-2019)
f. molle (BC; 1; 1995)
var. molle (BC; 1; 1948)
Paspalum dilatatum (AK, BC, OR; 48; 1885-2017)
Paspalum distichum (BC, ID, OR, WA; 135; 1885-2018)
Paspalum monostachyum (BC, ID; 3; 1951-1978)
Paspalum setaceum (MT; 2; 1938)
Pennisetum alopecuroided (WA; 1; 2001)
Pennisetum ciliare (BC; 1; 1970)
Pennisetum glaucum (ID; 3; 1964-1987)
Pennisetum setaceum (WA; 1; 2001)
Pennisetum villosum (OR; 2; 2005)
Phalaris alpinum (WA; 1; 1897)
Phalaris angusta (OR; 3; 1926-1951)
Phalaris aquatica (BC, ID, OR; 25; 1916-2017)
Phalaris arundinacea (AK, BC, ID, MT, OR, WA, YK; 1017; 1875-2020)
Phalaris arundinaceae (ID; 1; 1987)
Phalaris brachystachys (OR; 2; 1902-1912)
Phalaris californica (OR; 3; 1884-1977)
Phalaris canariensis (AK, BC, ID, MT, OR, WA, YK; 62; 1887-2013)
Phalaris caroliniana (OR; 8; 1884-1977)
Phalaris minor (OR; 10; 1900-1949)
Phalaris paradoxa (OR, WA; 10; 1903-2012)
Phippsia algida (AK, BC, MT, YK; 136; 1938-2019)
Phleum alpinum (AK, BC, ID, MT, OR, WA, YK; 1429; 1863-2020)
ssp. alpinum (AK, BC, WA; 17; 1975-2009)
var. alpinum (ID, MT, OR, WA; 108; 1991-2011)
var. americana (AK; 1; 1951)
Phleum arenarium (OR; 8; 1906-1914)
Phleum communtatum (AK; 1; 1976)
Phleum paniculatum (OR, WA; 3; 1899-1902)
Phleum phleoides (BC; 1; 1990)
Phleum pratense (AK, BC, ID, MT, OR, WA, YK; 1237; 1883-2020)
ssp. pratense (BC, ID, MT, OR, WA; 53; 1885-2017)
var. pallida (BC; 1; 1972)
var. pratense (ID, MT, OR, WA; 303; 1895-2011)
Phleum subulatum (OR; 2; 1912)
Phragmites australis (BC, ID, MT, OR, WA; 346; 1877-2019)
ssp. americanus (BC, ID, OR, WA; 74; 1885-2019)
ssp. australis (BC, ID, MT, OR, WA; 78; 1877-2019)
Phyllostachys aurea (BC; 1; 2013)
Phyllostachys aureosulcata (OR; 1; 2014)
var. spectabilis (OR; 1; 2014)
Phyllostachys edulis (MT; 1; ?)
Piptatheropsis canadensis (BC, ID; 2; 1941-2018)
Piptatheropsis exigua (BC, ID, MT, OR, WA; 428; 1883-2020)
Piptatheropsis micrantha (BC, ID, MT; 58; 1887-2015)
Piptatheropsis pungens (BC, YK; 30; 1943-2016)
Piptatheropsis shoshoneana (ID; 51; 1979-2010)
Pleuropogon hooverianus (OR, WA; 17; 1883-2000)
Pleuropogon oregonus (OR; 16; 1937-2013)
Pleuropogon refractus (BC, OR, WA; 131; 1881-2017)
Pleuropogon sabinei (AK, MT; 8; 1939-2017)
Poa abbreviata (AK, BC, ID, MT, OR, WA, YK; 145; 1887-2018)
ssp. abbreviata (AK, YK; 3; 1970-2000)
ssp. marshii (ID; 5; 1978-2011)
ssp. pattersonii (AK, BC, ID, MT, OR, WA, YK; 127; 1887-2015)
Poa alpigena (AK; 9; 1950-1956)
var. vivipera (AK; 9; 1950-1956)
Poa alpina (AK, BC, ID, MT, OR, WA, YK; 1409; 1881-2020)
ssp. alpina (AK, BC, ID, MT, OR, WA, YK; 48; 1906-2015)
ssp. vivipara (AK; 3; 1971-2009)
var. alpina (ID, MT; 31; 2002-2012)
Poa annua (AK, BC, ID, MT, OR, WA, YK; 714; 1878-2020)
Poa arachnifera (ID; 1; 1967)
Poa arctica (AK, BC, ID, MT, WA, YK; 1676; 1700-2019)
ssp. aperta (BC; 1; 2014)
ssp. arctica (AK, BC, MT, WA, YK; 327; 1897-2019)
ssp. caespitans (AK, BC; 3; 1983-2013)
ssp. grayana (BC, ID, MT, WA; 37; 1897-2008)
ssp. lanata (AK, BC, YK; 347; 1700-2019)
var. arctica (BC; 1; 2006)
var. williamsii (BC; 2; 1980)
Poa arctica × Poa stenantha (AK; 1; 2013)
Poa arctostepporum (AK; 5; 1992)
Poa arida (BC, ID, MT, WA; 124; 1887-2014)
Poa arnowiae (ID; 13; 1978-1999)
Poa bolanderi (ID, OR, WA; 86; 1882-2013)
Poa bulbosa (AK, BC, ID, MT, OR, WA; 1109; 1876-2020)
ssp. bulbosa (OR, WA; 4; 1927-2007)
ssp. vivipara (BC, ID, MT, OR, WA; 297; 1908-2020)
Poa cambyi (MT, WA; 4; 1924-1964)
Poa canbyi (BC; 5; 1977-1995)
ssp. secunda (BC; 5; 1977-1995)
Poa canybi (MT; 2; 1968-1971)
Poa chambersii (OR; 15; 1914-2014)
Poa commutatum (YK; 1; 1970)
Poa compressa (AK, BC, ID, MT, OR, WA, YK; 848; 1882-2020)
ssp. interior (BC; 1; 2004)
Poa confinis (AK, BC, OR, WA; 124; 1882-2017)
Poa curtifolia (WA; 46; 1898-2012)
Poa cusickii (BC, ID, MT, OR, WA, YK; 1412; 1880-2020)
ssp. cusickii (BC, ID, MT, OR, WA; 254; 1882-2019)
ssp. epilis (BC, ID, MT, OR, WA; 531; 1881-2019)
ssp. pallida (BC, ID, MT, OR, WA, YK; 142; 1895-2019)
ssp. purpurascens (BC, ID, OR, WA; 150; 1880-2010)
ssp. subaristata (ID, MT; 15; 1921-1983)
Poa cusickii var. epilis × Poa grayana (ID; 2; 1970)
var. subaristata (MT; 2; 1934-1945)
Poa douglasii (ID; 54; 1916-1989)
Poa epilis (WA; 1; 1882)
var. purpurascens (WA; 1; 1882)
Poa fendleriana (BC, ID, MT, OR, WA; 472; 1885-2019)
ssp. fendleriana (BC, ID, MT; 24; 1913-2014)
ssp. longiligula (BC, ID, MT, OR, WA; 81; 1885-2017)
Poa glauca (AK, BC, ID, MT, OR, WA, YK; 1436; 1700-2020)
ssp. glauca (AK, BC, MT, OR, YK; 110; 1902-2017)
ssp. rupicola (AK, BC, ID, MT, OR, WA, YK; 245; 1900-2020)
var. glauca (ID; 8; 1993-1995)
var. pekulnejensis (AK; 1; 1993)
Poa glauca × Poa secunda (ID; 1; 1976)
Poa gracillia (ID; 4; 1993)
Poa gracillima (BC, WA; 3; 1957-1982)
ssp. secunda (BC; 2; 1957-1982)
Poa grayana (BC; 2; 1982)
ssp. glauca (BC; 2; 1982)
Poa hartzii (AK; 20; 1968-2018)
ssp. alaskana (AK; 14; 1976-2018)
Poa hendersoni (OR, WA; 2; 1882-1885)
Poa howellii (BC, OR, WA; 121; 1881-2016)
Poa infirma (BC, OR, WA; 35; 1902-2018)
Poa interior (AK, BC, ID, MT, OR, WA, YK; 737; 1884-2020)
Poa juncifolia × Poa sandbergii (WA; 1; 1972)
Poa kelloggii (BC, OR; 3; 1978)
Poa kellogii (ID; 2; 1949)
Poa lanata (BC; 4; 1982)
ssp. lanata (BC; 4; 1982)
Poa laxa (ID, MT, OR, WA; 5; 1900-2018)
Poa laxiflora (AK, BC, OR, WA; 95; 1881-2018)
Poa leibergii (ID, OR, WA; 191; 1877-2018)
Poa leptocoma (AK, BC, ID, MT, OR, WA, YK; 322; 1884-2020)
Poa lettermanii (BC, ID, MT, OR, WA; 97; 1889-2016)
Poa ×limosa (BC, OR; 5; 1901-2008)
Poa macrantha (AK, BC, OR, WA; 185; 1882-2013)
Poa macrocalyx (AK; 123; 1871-2015)
Poa malacantha (BC; 2; 1982)
ssp. lanata (BC; 2; 1982)
Poa mansfieldii (OR; 10; 1992-2014)
Poa marcida (BC, OR, WA; 73; 1882-2013)
Poa ×multnomae (OR, WA; 23; 1903-2019)
Poa ×nematophylla (BC, ID; 3; 1977-2018)
Poa nemoralis (AK, BC, ID, MT, OR, WA, YK; 141; 1884-2015)
var. nemoralis (BC; 1; 2008)
Poa nervosa (BC, ID, MT, OR, WA; 417; 1882-2018)
Poa nevadensis > Poa juncifolia (MT; 1; 1938)
Poa nevadensis > Poa scabrella (ID; 1; 1963)
Poa obvallata (MT; 1; 1922)
Poa occidentalis (BC; 2; 1952)
Poa palustris (AK, BC, ID, MT, OR, WA, YK; 1399; 1855-2019)
Poa pattersonii (ID; 3; 1937)
ssp. subcalva (ID; 3; 1937)
Poa paucispicula (AK, BC, ID, MT, OR, WA, YK; 447; 1889-2020)
Poa piperi (OR; 39; 1887-2013)
Poa porsildii (AK, YK; 59; 1956-2015)
Poa pratensis (AK, BC, ID, MT, OR, WA, YK; 3481; 1876-2020)
ssp. agassizensis (BC, ID, MT, OR, WA; 49; 1916-2020)
ssp. alpigena (AK, BC, ID, MT, OR, WA, YK; 310; 1915-2019)
ssp. angustifolia (AK, BC, MT, WA, YK; 32; 1903-2016)
ssp. colpodea (AK, BC, YK; 20; 1953-2018)
ssp. irrigata (AK, BC, ID, OR, WA, YK; 51; 1904-2019)
ssp. latifolia (OR; 6; 1901-1959)
ssp. pratensis (AK, BC, ID, OR, WA, YK; 170; 1912-2020)
Poa pratensis × Poa wheeleri (MT, WA; 2; 1995-1996)
Poa pringlei (ID, OR, WA; 43; 1887-2018)
Poa pseudoabbreviata (AK, BC, YK; 106; 1939-2015)
Poa raduliformis (AK; 1; 1968)
Poa reflexa (BC, ID, MT, OR, WA; 158; 1886-2018)
Poa rhizomata (AK, OR, WA; 12; 1899-2007)
Poa rupicola (BC; 1; 1995)
ssp. rupicola (BC; 1; 1995)
Poa sandbergii (WA; 3; 1978-1986)
var. incurva (WA; 3; 1978-1986)
Poa scabrella (BC; 20; 1976-1980)
ssp. secunda (BC; 20; 1976-1980)
Poa secunda (AK, BC, ID, MT, OR, WA, YK; 7269; 1876-2020)
ssp. juncifolia (BC, ID, MT, OR, WA, YK; 1420; 1881-2020)
ssp. nevadensis (WA; 7; 1897-1987)
ssp. secunda (AK, BC, ID, MT, OR, WA, YK; 3609; 1876-2020)
var. canbyi (OR; 1; 2001)
var. saxitilis (WA; 1; 1939)
var. secunda (ID, MT, OR, WA; 12; 1934-2018)
Poa serahina (MT; 1; 1895)
Poa sibirica (AK; 1; 1968)
Poa stebbinsii (WA; 1; 1967)
Poa stenantha (AK, BC, ID, MT, OR, WA, YK; 325; 1882-2020)
var. stenantha (AK, BC, ID, MT, OR, WA; 90; 1882-2020)
var. vivipara (AK; 2; 1940)
Poa sublanata (AK; 27; 2011-2018)
Poa suksdorfii (BC, OR, WA; 55; 1882-2013)
Poa supina (BC; 4; 2008-2013)
Poa sylvestris (OR; 1; 1937)
Poa trivialis (AK, BC, ID, MT, OR, WA, YK; 317; 1890-2020)
ssp. alpigena (BC; 1; 2003)
ssp. pratensis (BC; 1; 2007)
ssp. trivialis (OR, WA; 3; 2018-2019)
Poa unilateralis (OR, WA; 32; 1904-2018)
ssp. pachypholis (OR, WA; 12; 1904-1986)
ssp. unilateralis (OR; 6; 1936-2018)
Poa wallowensis (OR; 3; 1988-2001)
Poa wheeleri (BC, ID, MT, OR, WA; 1029; 1882-2020)
Podagrostis aequivalvis (AK, BC, OR, WA; 228; 1890-2017)
Podagrostis humilis (AK, BC, ID, MT, OR, WA, YK; 392; 1882-2020)
Podagrostis thurberiana (AK, BC, ID, MT, OR, WA; 412; 1882-2020)
Polypogon australis (OR, WA; 5; 1895-1918)
Polypogon fugax (OR, WA; 3; 1902-2016)
Polypogon interruptus (BC, OR, WA; 26; 1884-2018)
Polypogon maritimus (OR, WA; 11; 2011-2019)
Polypogon monspeliensis (AK, BC, ID, MT, OR, WA; 654; 1883-2019)
Polypogon viridis (BC, OR, WA; 22; 1895-1991)
Polytrias indica (WA; 1; 1901)
Psathyrostachys juncea (AK, BC, ID, MT, WA, YK; 43; 1939-2017)
Pseudelymus douglasii (WA; 1; 1900)
×Pseudelymus saxicola (BC, ID, MT, OR, WA; 59; 1897-2016)
Pseudoroegnaria spicata (ID, MT, WA; 20; 1983-2019)
ssp. spicata (WA; 4; 2002-2006)
Pseudoroegneria spicata (AK, BC, ID, MT, OR, WA, YK; 2304; 1881-2020)
ssp. secunda (WA; 1; 1902)
var. inermis (OR, WA; 3; 1906-1992)
var. spicatum (WA; 1; 1992)
Pseudoroegneria spicata × Thinopyrum ponticum (ID; 1; 1934)
Pseudosasa humilis (BC; 3; 2013-2014)
Pseudosasa japonica (BC, WA; 21; 1942-2015)
Ptilagrostis alpina (AK; 1; 1968)
Puccinellia andersonii (AK; 8; 1971-2019)
Puccinellia angustata (AK, YK; 9; 1968-2005)
Puccinellia arctica (AK; 2; 1953-1972)
Puccinellia borealis (AK, YK; 27; 1971-2015)
Puccinellia distans (AK, BC, ID, MT, OR, WA, YK; 259; 1901-2019)
Puccinellia fasciculata (OR; 1; 1999)
Puccinellia lemmonii (BC, ID, MT, OR, WA; 98; 1885-2017)
Puccinellia maritima (BC, WA; 7; 1979-1997)
Puccinellia nutkaensis (AK, BC, OR, WA, YK; 253; 1886-2018)
Puccinellia nuttalliana (AK, BC, ID, MT, OR, WA, YK; 413; 1887-2018)
Puccinellia phryganodes (AK, YK; 75; 1959-2019)
ssp. phryganodes (AK; 4; 1998-2001)
Puccinellia phyrganodes (AK; 1; 1977)
Puccinellia pumila (AK, BC, OR, WA; 100; 1887-2017)
Puccinellia simplex (OR; 3; 2017-2018)
Puccinellia tenella (AK, YK; 25; 1932-2017)
ssp. langeana (AK, YK; 16; 1974-2015)
Puccinellia tenuiflora (OR; 4; 1905-1906)
Puccinellia vaginata (AK, YK; 24; 1970-2017)
Puccinellia vahliana (AK, YK; 15; 1957-2006)
Puccinellia wrightii (AK; 24; 1945-2017)
ssp. wrightii (AK; 3; 2013)
Redfieldia flexuosa (OR, WA; 3; 1936-1993)
Roegneria turuchanensis (AK; 1; 1992)
Roegneria villosa (AK; 1; 1992)
Rostraria cristata (OR, WA; 5; 1903-1916)
Rytidosperma biannulare (OR; 1; 1945)
Rytidosperma penicillatum (OR; 4; 1945-2006)
Saccharum baldwinii (MT; 1; 1928)
Sasa palmata (BC, WA; 10; 1986-2018)
×Schedolium braunii (BC; 2; 1978)
×Schedolium holmbergii (OR; 1; 2006)
×Schedolium loliaceum (BC; 1; 2005)
Schedonnardus paniculatus (BC, MT; 93; 1888-2011)
Schedonorus arundinaceus (AK, BC, ID, MT, OR, WA, YK; 443; 1886-2020)
Schedonorus pratensis (AK, BC, ID, MT, OR, WA; 308; 1882-2020)
Schizachne purpurascens (AK, BC, ID, MT, WA, YK; 88; 1889-2018)
Schizachyrium scoparium (BC, ID, MT, WA; 156; 1886-2015)
var. scoparium (MT, WA; 72; 1900-2015)
var. stoloniferum (WA; 1; 2012)
Sclerochloa dura (BC, ID, MT, OR, WA; 118; 1932-2015)
Scleropoa rigida (OR; 9; 1916-1921)
Scolochloa festucacea (AK, BC, ID, MT, OR, WA; 35; 1927-2014)
Scribneria bolanderi (OR, WA; 29; 1884-2019)
Secale cereale (AK, BC, ID, MT, OR, WA, YK; 196; 1889-2019)
Secale strictum (OR, WA; 5; 1927-2004)
Setaria faberi (BC, OR, WA; 9; 1998-2016)
Setaria italica (BC, ID, MT, OR, WA; 22; 1885-2019)
Setaria leucopila (ID; 1; 1986)
Setaria magna (WA; 1; 1937)
Setaria parviflora (OR; 2; 1916-1969)
Setaria pumila (BC, ID, MT, OR, WA; 155; 1895-2020)
ssp. pallide-fusca (OR; 4; 1900-2004)
ssp. pumila (BC, ID, MT, OR, WA; 125; 1895-2020)
Setaria verticillata (BC, ID, MT, OR, WA; 53; 1938-2020)
Setaria ×verticilliformis (BC; 2; 1947)
Setaria viridis (AK, BC, ID, MT, OR, WA, YK; 447; 1887-2020)
ssp. viridis (OR; 1; 2006)
var. major (OR, WA; 8; 1920-2018)
var. viridis (BC, ID, OR, WA; 77; 1900-2020)
Sitanion jubatum (OR; 1; 1908)
var. californicum (OR; 1; 1908)
Sorghum bicolor (BC, ID, MT, OR, WA; 53; 1917-2019)
Sorghum ×drummondii (ID; 1; 1932)
Sorghum halepense (BC, ID, MT, OR, WA; 53; 1890-2017)
Spartina alterniflora (OR, WA; 18; 1948-2005)
Spartina anglica (BC, WA; 30; 1983-2011)
Spartina cynosuroides (MT, WA; 4; 1901-1913)
Spartina densiflora (BC, WA; 6; 2001-2014)
Spartina gracilis (BC, ID, MT, OR, WA; 294; 1884-2019)
Spartina patens (BC, OR, WA; 16; 1977-2005)
Spartina pectinata (BC, ID, MT, OR, WA; 146; 1886-2019)
Spartina ×townsendii (BC, WA; 5; 1965-2006)
Sphenopholis filiformis (WA; 1; 1902)
Sphenopholis intermedia (AK, BC, MT, OR, WA, YK; 76; 1884-2016)
Sphenopholis obtusata (BC, ID, MT, OR, WA; 90; 1883-2015)
Sphenopholis ×pallens (WA; 3; 1892-1902)
Sporobolus airoides (BC, ID, MT, OR, WA; 149; 1890-2017)
var. oblongifolia (BC; 1; 2001)
Sporobolus brevifolius (MT; 1; ?)
Sporobolus compositus (BC, ID, MT, WA; 33; 1939-2014)
var. compositus (BC, WA; 22; 1992-2014)
Sporobolus cryptandrus (BC, ID, MT, OR, WA; 334; 1877-2020)
var. cryptandrus (WA; 6; 1889-1919)
Sporobolus dryptandrus (MT; 1; 1965)
Sporobolus indicus (OR; 1; 1900)
Sporobolus neglectus (MT, WA; 11; 1902-2012)
Sporobolus richardsonii (WA; 1; 1902)
Sporobolus texanus (ID; 1; 2009)
Sporobolus vaginiflorus (BC, ID, WA; 44; 1982-2020)
var. vaginiflorus (BC, ID, WA; 27; 2002-2020)
Stipa lemmonii × Stipa occidentalis (WA; 1; 1952)
Stipa lemmonii × Stipa occidentalis var. occidentalis (WA; 1; 1923)
Stipa lettermanii × Stipa occidentalis var. pubescens (ID; 1; 1944)
Stipa occidentalis (OR, WA; 6; 1907-2001)
var. idahoensis (OR; 3; 1907)
Stipa occidentalis × Stipa thurberiana (OR; 1; 1946)
Taeniatherum caput-medusae (ID, MT, OR, WA; 237; 1884-2019)
Teaniatherum caput-medusae (OR; 1; 2002)
Thinopyrum elongatum (BC, ID, MT, WA; 18; 1948-2012)
Thinopyrum intermedium (BC, ID, MT, OR, WA, YK; 298; 1889-2020)
ssp. barbulatum (BC, ID, MT, OR, WA; 52; 1953-2019)
ssp. intermedium (BC, ID, OR, WA; 48; 1893-2020)
var. intermedium (ID; 3; 2009-2011)
Thinopyrum junceum (OR; 7; 1911-1925)
Thinopyrum ponticum (BC, ID, MT, OR, WA, YK; 115; 1927-2019)
Thinopyrum pungens (BC; 1; 1987)
Thinopyrum pycnanthum (OR; 1; 1919)
Thynopyrum intermedium (WA; 1; 1902)
Torreyochloa erecta (OR; 25; 1896-2005)
Torreyochloa pallida (AK, BC, ID, MT, OR, WA, YK; 806; 1875-2020)
var. fernaldii (BC; 1; 1977)
var. pallida (WA; 2; 1892-1999)
var. pauciflora (AK, BC, ID, MT, OR, WA, YK; 780; 1875-2020)
Torreyochloa pauciflora (BC; 1; 1990)
ssp. pauciflora (BC; 1; 1990)
Tridens albescens (WA; 1; ?)
Tridens flavus (ID, MT; 2; 1897-1900)
Tridens muticus (ID; 1; 1999)
Tripidium ravennae (ID, OR, WA; 12; 2011-2018)
Triplasis purpurea (OR, WA; 25; 1990-2018)
var. purpurea (OR; 1; 2008)
Tripogon spicatus (ID; 1; 1974)
Trisetum canescens (AK, BC, ID, MT, OR, WA; 581; 1882-2020)
Trisetum cernuum (AK, BC, ID, MT, OR, WA; 529; 1882-2019)
var. pubescens (WA; 4; 1889-1933)
Trisetum flavescens (BC, ID, OR, WA; 8; 1898-2018)
Trisetum orthochaetum (MT; 9; 1949-1994)
Trisetum sibiricum (AK, YK; 10; 1960-2008)
ssp. litorale (AK; 7; 1960-2002)
Trisetum spicatum (AK, BC, ID, MT, OR, WA, YK; 2526; 1700-2020)
var. stricta (BC; 1; 1989)
×Triticosecale wittmack (WA; 2; 1988)
Triticum aestivum (AK, BC, ID, MT, OR, WA; 176; 1882-2020)
Triticum compactum (ID; 1; 1966)
Urochloa mutica (AK, OR; 2; 1915-1977)
Vahlodea atropurpurea (AK, BC, ID, MT, OR, WA, YK; 928; 1881-2020)
Ventenata dubia (BC, ID, MT, OR, WA; 298; 1957-2020)
Vulpia bromoides (BC, ID, MT, OR, WA; 458; 1889-2020)
Vulpia microstachys (BC, ID, MT, OR, WA; 760; 1880-2020)
var. ciliata (ID, WA; 5; 1909-1975)
var. confusa (ID, OR, WA; 30; 1883-1962)
var. microstachys (BC, ID, OR, WA; 25; 1902-2013)
var. pauciflora (BC, ID, OR, WA; 270; 1880-2017)
Vulpia myuros (AK, BC, ID, MT, OR, WA; 549; 1875-2020)
Vulpia octoflora (BC, ID, MT, OR, WA; 483; 1877-2020)
var. hirtella (BC, ID, MT, OR, WA; 40; 1883-2020)
var. octoflora (BC, ID, MT, OR, WA; 115; 1883-2011)
var. tenella (BC, MT, WA; 23; 1892-2014)
Zea mays (BC, ID, MT, WA; 13; 1956-2011)
ssp. mays (BC, WA; 7; 2005-2011)
Zizania aquatica (BC, ID, WA; 21; 1932-2004)
var. aquatica (BC, WA; 3; 2004)
Zizania palustris (BC, ID, MT, OR, WA; 36; 1927-2019)
var. interior (BC, ID; 7; 1927-2009)
var. palustris (BC, ID, OR, WA; 11; 1934-2019)