Vascular Plants of the Pacific Northwest
Poaceae

Generated from PNW Herbaria database
June 23, 2018.

174 genus names
1,173 species/infraspecies names
(names highlighted in brown could not be resolved to an accepted name)

Index to Genera:

Z: Zea, Zizania,

Achnatherum
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; 908; 1881-2017)
Achnatherum lemmonii (BC, ID, MT, OR, WA; 658; 1882-2016)
ssp. lemmonii (BC, ID, MT, OR, WA; 300; 1882-2015)
ssp. lemmonnii (WA; 1; 2010)
ssp. pubescens (OR, WA; 24; 1883-2000)
var. lemmonnii (WA; 2; 2006)
Achnatherum lemmonii × Achnatherum occidentale ssp. pubescebus (WA; 1; 1937)
Achnatherum lettermanii (BC, ID, MT, OR, WA; 212; 1885-2017)
Achnatherum nelsonii (BC, ID, MT, OR, WA, YK; 1229; 1883-2017)
ssp. dorei (BC, ID, MT, OR, WA, YK; 674; 1884-2017)
ssp. nelsonii (BC, ID, MT, OR, WA; 299; 1883-2017)
Achnatherum nevadense (ID, MT, OR; 24; 1908-2014)
Achnatherum occidentale (BC, ID, MT, OR, WA; 690; 1880-2017)
ssp. californicum (ID, OR, WA; 136; 1884-2017)
ssp. occidentale (ID, MT, OR, WA; 119; 1882-2017)
ssp. pubescens (BC, ID, MT, OR, WA; 249; 1880-2017)
Achnatherum pinetorum (ID, MT, OR; 39; 1911-2016)
Achnatherum richardsonii (BC, ID, MT, OR, WA, YK; 247; 1887-2009)
Achnatherum robustum (MT, OR, WA; 6; 1898-2007)
Achnatherum swallenii (ID; 42; 1941-2009)
Achnatherum thurberianum (BC, ID, MT, OR, WA; 440; 1884-2016)
Achnatherum wallowaense (OR; 28; 1916-2013)
Achnatherum webberi (ID, OR, WA; 71; 1934-2013)
Acnatherum
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
Aegilops bicornis (WA; 1; 1931)
Aegilops comosa (OR; 4; 1997)
Aegilops cylindrica (BC, ID, MT, OR, WA; 103; 1917-2016)
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
×Aegilotriticum sancti-andreae (OR; 3; 1979-1993)
Agroelymus
×Agroelymus hultenii (AK; 1; 1938)
Agropogon
×Agropogon lutosus (OR; 4; 1919-1968)
Agropyron
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; 507; 1898-2017)
ssp. pectinatum (BC, WA, YK; 40; 1938-2001)
var. cristatum (ID, MT; 78; 1991-2011)
Agropyron desertorum (BC, ID, MT, OR, WA; 145; 1924-2011)
ssp. desertorum (BC; 2; 1974-1980)
Agropyron divergens (WA; 4; 1893-1904)
var. inermis (WA; 1; 1893)
Agropyron fragile (AK, BC, ID, MT, OR, WA; 29; 1941-2014)
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 persicum (MT; 1; 1967)
Agropyron saxicola (ID; 4; 1932-1973)
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
Agrostis aequalis (BC; 1; 2005)
Agrostis alba (AK, BC, ID, MT, OR, WA; 204; 1884-2004)
var. alba (BC, ID, OR, WA; 26; 1940-2002)
Agrostis bakeri × Agrostis idahoensis (ID; 1; 1944)
Agrostis canina (AK, BC, ID, OR; 12; 1881-2013)
Agrostis capillaris (AK, BC, ID, MT, OR, WA, YK; 391; 1888-2018)
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; 2038; 1875-2017)
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; 497; 1887-2016)
var. palustris (BC; 1; 1990)
var. stolonifera (ID; 1; 1963)
Agrostis hallii (OR, WA; 59; 1882-2012)
Agrostis hendersonii (OR; 1; 1930)
Agrostis howellii (OR, WA; 23; 1882-2013)
Agrostis hyemalis (BC, ID, MT, OR, WA; 39; 1887-2008)
Agrostis idahoensis (BC, ID, MT, OR, WA; 245; 1883-2017)
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; 198; 1920-2014)
ssp. mertensii (YK; 1; 2000)
var. borealis (AK; 1; 1980)
Agrostis microphylla (BC, ID, OR, WA; 97; 1880-2012)
Agrostis ×murbeckii (OR, WA; 2; 2007)
Agrostis nebulosa (OR; 1; 1903)
Agrostis oregonensis (BC, ID, MT, OR, WA; 163; 1881-2012)
Agrostis oregonensis × Agrostis scabra (WA; 1; 1910)
Agrostis pallens (AK, BC, ID, MT, OR, WA; 355; 1881-2016)
Agrostis perennans (BC, WA; 5; 1884-1977)
Agrostis rossae (ID, OR, WA; 10; 1907-1940)
Agrostis rossiae (ID, MT, WA; 63; 1922-2016)
Agrostis scabra (AK, BC, ID, MT, OR, WA, YK; 2132; 1881-2017)
ssp. scabra (YK; 1; 2002)
Agrostis scabra × Agrostis oregonensis (WA; 2; 1893-1900)
Agrostis stolonifera (AK, BC, ID, MT, OR, WA, YK; 1371; 1874-2017)
var. majus (BC; 1; 1987)
Agrostis variabilis (BC, ID, MT, OR, WA; 423; 1877-2015)
Agrostis vinealis (AK; 15; 1966-2003)
Aira
Aira caryophyllea (BC, ID, OR, WA; 554; 1881-2017)
var. caryophyllea (BC, ID, OR, WA; 126; 1881-2017)
Aira elegans (MT, OR, WA; 39; 1906-2009)
Aira praecox (BC, OR, WA, YK; 397; 1889-2016)
Alopecuris
Alopecuris magellanicus (MT; 28; 1897-2011)
Alopecurus
Alopecurus aequalis (AK, BC, ID, MT, OR, WA, YK; 1195; 1880-2017)
var. aequalis (BC, ID, MT, OR, WA, YK; 272; 1880-2012)
Alopecurus alpinus (AK; 5; 1975-2004)
var. alpinus (AK; 1; 1975)
Alopecurus arundinaceus (AK, BC, ID, MT, WA; 59; 1961-2011)
Alopecurus carolinianus (BC, ID, MT, OR, WA; 110; 1888-2011)
Alopecurus geniculatus (AK, BC, ID, MT, OR, WA; 390; 1880-2016)
var. geniculatus (ID, WA; 3; 1999-2000)
Alopecurus magellanicus (AK, BC, ID, MT, WA, YK; 303; 1889-2016)
Alopecurus myosuroides (BC, ID, OR, WA; 22; 1900-2005)
Alopecurus pratensis (AK, BC, ID, MT, OR, WA, YK; 455; 1700-2017)
Alopecurus saccatus (MT, OR, WA; 46; 1881-2017)
Amelichloa
Amelichloa caudata (OR; 1; 1915)
Ammophila
Ammophila arenaria (BC, OR, WA; 100; 1914-2017)
ssp. arenaria (OR, WA; 33; 1914-2017)
Ammophila breviligulata (BC, OR, WA; 9; 1929-2017)
ssp. breviligulata (OR, WA; 4; 1929-2017)
Andropogon
Andropogon gerardii (MT; 103; 1890-2011)
ssp. hallii (MT; 18; 1937-2011)
Anthoxanthum
Anthoxanthum arcticum (AK, YK; 68; 1926-2014)
Anthoxanthum aristatum (BC, ID, OR, WA; 38; 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; 399; 1889-2015)
Apera
Apera interrupta (BC, ID, MT, OR, WA; 274; 1918-2015)
Apera spica-venti (ID, OR, WA; 17; 1902-2002)
Arctagrostis
Arctagrostis latifolia (AK, BC, YK; 648; 1899-2014)
ssp. arundinacea (AK, BC, YK; 71; 1899-2014)
ssp. latifolia (AK, BC, YK; 13; 1977-2013)
Arctophila
Arctophila fulva (AK, BC, YK; 259; 1923-2017)
Arctopoa
Arctopoa eminens (AK, BC; 199; 1917-2014)
Aristida
Aristida adscensionis (ID; 1; 1937)
Aristida dichotoma (BC; 1; ?)
Aristida oligantha (BC, ID, OR; 36; 1887-2014)
Aristida purpurea (BC, ID, MT, OR, WA; 313; 1887-2017)
var. fendleriana (MT; 12; 1899-2008)
var. longiseta (BC, ID, MT, OR, WA; 236; 1887-2017)
var. nealleyi (ID; 1; 1978)
var. parishii (BC; 1; 1968)
Arrhenatherum
Arrhenatherum elatius (AK, BC, ID, MT, OR, WA; 307; 1882-2017)
ssp. bulbosum (BC, OR, WA; 17; 1926-2014)
ssp. elatius (BC, ID, MT, OR, WA; 82; 1882-2013)
Arundinaria
Arundinaria humilis (BC; 2; 2013-2014)
Arundo
Arundo donax (OR; 1; 2013)
Avena
Avena barbata (BC, ID, OR, WA; 34; 1883-2017)
Avena fatua (AK, BC, ID, MT, OR, WA, YK; 261; 1879-2017)
var. glabrescens (WA; 1; 1902)
Avena pubiscens (WA; 1; 1937)
Avena sativa (AK, BC, ID, MT, OR, WA, YK; 73; 1890-2009)
Avenella
Avenella flexuosa (BC; 4; 1938-2010)
Avenula
Avenula hookeri (BC, MT, YK; 115; 1887-2012)
Beckmannia
Beckmannia erucaeformis (MT, WA; 6; 1892-1992)
Beckmannia syzigachne (AK, BC, ID, MT, OR, WA, YK; 766; 1877-2017)
Blepharidachne
Blepharidachne kingii (ID; 4; 1995)
Bothriochloa
Bothriochloa barbinodis (ID; 1; 1994)
Bothriochloa ischaemum (MT; 1; 1997)
Bothriochloa laguroides (ID; 2; 1989-1994)
Bothriochloa saccharoides (WA; 1; 1918)
Bouteloua
Bouteloua barbata (MT; 2; 1941)
Bouteloua curtipendula (BC, MT; 85; 1890-2013)
var. curtipendula (MT; 32; 1942-2010)
Bouteloua dactyloides (ID, MT; 78; 1903-2011)
Bouteloua gracilis (BC, ID, MT, WA; 298; 1890-2015)
Bouteloua hirsuta (MT; 3; 1986-2009)
var. hirsuta (MT; 2; 2007-2009)
Brachyelytrum
Brachyelytrum aristosum (BC; 1; 1975)
Brachypodium
Brachypodium distachyon (OR; 2; 1902)
Brachypodium pinnatum (OR; 1; 1949)
Brachypodium sylvaticum (BC, OR, WA; 53; 1939-2017)
ssp. sylvaticum (BC; 1; 2010)
Briza
Briza maxima (BC, OR, WA; 50; 1948-2016)
Briza media (OR; 2; 2013)
Briza minor (BC, ID, OR, WA; 127; 1884-2006)
Bromopsis
Bromopsis pumpelliana (AK; 5; 2005-2014)
ssp. pumpelliana (AK; 3; 2006-2014)
var. arctica (AK; 2; 2005-2006)
Bromus
Bromus anomalus (BC, ID, MT, OR, WA; 93; 1886-2016)
Bromus arenarius (OR, WA; 10; 1908-2013)
Bromus arvensis (ID, OR; 15; 1930-2014)
Bromus berteroanus (BC, OR, WA; 3; 1902-1979)
Bromus biebersteinii (MT; 1; 1980)
Bromus brachyphullus (OR; 1; 1901)
Bromus briziformis (BC, ID, MT, OR, WA; 426; 1884-2016)
Bromus carinatus (AK, BC, ID, MT, OR, WA; 1583; 1882-2017)
var. carinatus (AK, BC, ID, MT, OR, WA; 1583; 1882-2017)
Bromus catharticus (ID, OR; 29; 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; 491; 1885-2016)
Bromus commutatus (BC, ID, MT, OR, WA; 452; 1882-2015)
ssp. commutatus (BC; 1; 1940)
Bromus commutatus × Bromus hordeaceus (WA; 1; 1892)
Bromus diandrus (BC, ID, MT, OR, WA; 360; 1890-2016)
Bromus erectus (ID, WA; 9; 1936-2011)
Bromus eximius (WA; 1; 1893)
var. umbraticus (WA; 1; 1893)
Bromus hordeaceus (AK, BC, ID, MT, OR, WA; 907; 1882-2017)
ssp. hordeaceus (AK, BC, ID, MT, OR, WA; 254; 1882-2011)
ssp. molliformis (OR; 2; 1916-2002)
ssp. pseudothominei (BC, ID, OR; 13; 1905-2015)
ssp. thominei (BC, OR; 3; 1917-1964)
var. glabrescens (OR; 2; 1908)
var. hordeaceus (OR; 1; 2008)
Bromus inermis (AK, BC, ID, MT, OR, WA, YK; 1106; 1805-2017)
ssp. pumpellianus (BC, WA; 9; 1975-2012)
Bromus japonicus (BC, ID, MT, OR, WA; 590; 1853-2017)
Bromus laevipes (OR, WA; 35; 1887-2014)
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; 159; 1889-2011)
Bromus pratensis (OR; 1; 1914)
Bromus ×pseudothominii (ID, WA; 2; 1953-1963)
Bromus pubescens (MT; 4; 1920-2007)
Bromus pumpellianus (AK, BC, ID, MT, OR, WA, YK; 507; 1800-2017)
ssp. pumpellianus (AK, BC, ID, MT, WA, YK; 35; 1884-2017)
var. lanata (MT; 2; 1895)
Bromus racemosus (BC, ID, MT, OR, WA; 126; 1874-2014)
Bromus ramosus (ID; 2; 1939-1951)
Bromus richardsonii (AK, BC, MT, YK; 96; 1897-2011)
Bromus riparius (BC, ID; 4; 2002-2011)
Bromus rubens (ID, MT, OR, WA; 70; 1894-2013)
Bromus scoparius (ID; 1; 1951)
Bromus secalinus (BC, ID, MT, OR, WA; 129; 1884-2012)
Bromus sitchensis (AK, BC, ID, MT, OR, WA, YK; 1248; 1882-2017)
var. aleutensis (AK, BC, ID, WA; 74; 1895-2007)
var. marginatus (BC, ID, MT, OR, WA, YK; 796; 1884-2017)
var. maritimus (ID, MT, OR, WA; 28; 1893-2010)
var. polyanthus (BC, ID, OR, WA; 50; 1902-2016)
var. sitchensis (AK, BC, OR, WA; 43; 1889-2011)
Bromus squarrosus (BC, ID, MT, OR, WA; 128; 1922-2016)
var. villosus (BC, WA; 10; 1947-2013)
Bromus sterilis (BC, ID, OR, WA; 286; 1904-2016)
Bromus subuliflora (WA; 1; 1999)
Bromus suksdorfii (ID, MT, OR, WA; 93; 1883-2017)
Bromus suksdorfii × Bromus vulgaris (OR; 1; 1928)
Bromus tectorum (AK, BC, ID, MT, OR, WA; 1961; 1882-2017)
f. tectorum (BC; 4; 1904-1979)
Bromus tenerum (WA; 1; 1919)
Bromus vulagris (ID; 1; 1949)
Bromus vulgaris (BC, ID, MT, OR, WA; 905; 1881-2017)
Calamagrostis
Calamagrostis acuminata (MT; 1; 1901)
Calamagrostis arundinacea (MT; 1; 1888)
Calamagrostis breweri (OR; 11; 1916-2013)
Calamagrostis canadensis (AK, BC, ID, MT, OR, WA, YK; 2436; 1875-2017)
var. canadensis (AK, BC, ID, MT, OR, WA, YK; 626; 1877-2017)
var. langsdorffii (AK, BC, ID, MT, OR, WA, YK; 474; 1875-2016)
Calamagrostis deacon (WA; 2; 1892)
var. robusta (WA; 2; 1892)
Calamagrostis deschampsioides (AK, YK; 103; 1926-2013)
Calamagrostis epigeios (BC, ID; 10; 1941-2011)
Calamagrostis foliosa (MT; 2; 1901)
Calamagrostis howellii (OR, WA; 56; 1881-2013)
Calamagrostis koelerioides (ID, MT, OR, WA; 44; 1887-2010)
Calamagrostis lapponica (AK, BC, WA, YK; 176; 1893-2014)
var. canadensis (BC; 1; 1981)
Calamagrostis montanensis (BC, ID, MT, WA; 153; 1883-2015)
Calamagrostis nutkaensis (AK, BC, OR, WA; 337; 1882-2013)
Calamagrostis purpurascens (AK, BC, ID, MT, OR, WA, YK; 857; 1886-2017)
Calamagrostis rigescens (WA; 1; 1937)
Calamagrostis rubescens (BC, ID, MT, OR, WA; 756; 1853-2017)
Calamagrostis scopulorum (MT; 9; 1957-2011)
Calamagrostis scribneri (MT; 1; 1931)
var. dubia (MT; 1; 1931)
Calamagrostis sesquiflora (AK, BC, MT; 67; 1935-2008)
Calamagrostis stricta (AK, BC, ID, MT, OR, WA, YK; 952; 1875-2016)
ssp. crassiglumis (BC; 1; 1972)
ssp. groenlandica (AK, YK; 12; 1949-2006)
ssp. inexpansa (AK, BC, ID, MT, OR, WA, YK; 582; 1875-2015)
ssp. stricta (AK, BC, ID, MT, OR, WA, YK; 105; 1885-2016)
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 (OR, WA; 48; 1886-2017)
Calamagrostis tenuis (AK; 3; 1992-1993)
Calamagrostis tweedyi (ID, MT, OR, WA; 54; 1937-2012)
Calamovilfa
Calamovilfa gigantea (WA; 3; 1937-1993)
Calamovilfa longifolia (BC, MT, WA; 220; 1886-2017)
var. longifolia (BC, MT, WA; 81; 1981-2011)
Calotheca
Calotheca brizoides (WA; 1; 1894)
Capillare
Capillare capillare (WA; 1; 1980)
ssp. capillare (WA; 1; 1980)
Catabrosa
Catabrosa aquatica (AK, ID, MT, OR; 198; 1887-2017)
ssp. aquatica (ID, MT; 2; 1992-1997)
Cenchrus
Cenchrus biflorus (WA; 2; 1937-1963)
Cenchrus compressus (BC; 1; 2006)
Cenchrus incertus (ID; 1; 1931)
Cenchrus longispinus (BC, ID, MT, OR, WA; 87; 1916-2016)
Cenchrus orientalis (WA; 1; 2014)
Cenchrus spinifex (ID, MT, OR, WA; 12; 1926-1998)
Cenchrus tribuloides (MT; 1; ?)
Chasmanthium
Chasmanthium latifolium (WA; 1; 1959)
Chloris
Chloris radiata (OR; 1; 1915)
Chloris verticillata (ID, OR; 9; 1994-2013)
Cinna
Cinna latifolia (AK, BC, ID, MT, OR, WA, YK; 669; 1881-2017)
Cladoraphis
Cladoraphis cyperoides (OR; 2; 1915)
Coleanthus
Coleanthus subtilis (BC, OR, WA; 29; 1880-1998)
Coleataenia
Coleataenia longifolia (BC, OR; 15; 1966-2016)
ssp. rigidula (BC, OR; 15; 1966-2016)
Cortaderia
Cortaderia jubata (OR, WA; 18; 1959-2016)
Cortaderia selloana (BC, OR, WA; 44; 1953-2016)
Corynephorus
Corynephorus canescens (BC, WA; 10; 1938-2016)
Crypsis
Crypsis alopecuroides (BC, ID, MT, OR, WA; 150; 1926-2016)
Crypsis schoenoides (ID, OR; 17; 1961-2016)
Crypsis vaginiflora (ID, OR, WA; 13; 1976-2016)
Cynodon
Cynodon dactylon (BC, ID, MT, OR, WA; 81; 1897-2015)
var. dactylon (OR; 6; 1900-2003)
Cynodon ×magennisii (OR; 1; 2008)
Cynosurus
Cynosurus cristata (WA; 1; 2017)
Cynosurus cristatus (BC, ID, MT, OR, WA; 127; 1903-2013)
Cynosurus echinatus (BC, ID, OR, WA; 205; 1919-2015)
Dactylis
Dactylis glomerata (AK, BC, ID, MT, OR, WA, YK; 1062; 1882-2017)
Danthonia
Danthonia californica (BC, ID, MT, OR, WA; 717; 1881-2017)
ssp. americana (WA; 1; 1889)
var. macounii (BC; 2; 1990)
Danthonia californica × Danthonia intermedia (BC; 1; 1983)
Danthonia californica × Danthonia spicata (BC; 1; 1977)
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; 997; 1884-2017)
ssp. intermedia (OR; 4; 1978)
Danthonia parryi (MT; 9; 1932-1998)
Danthonia spicata (AK, BC, ID, MT, OR, WA, YK; 327; 1890-2016)
Danthonia unispicata (BC, ID, MT, OR, WA; 517; 1886-2017)
Dasyochloa
Dasyochloa pulchella (ID; 1; 1942)
Deschampsia
Deschampsia atropurpurea (BC; 2; 1979)
ssp. latifolia (BC; 2; 1979)
Deschampsia brevifolia (AK, YK; 46; 1944-2016)
Deschampsia caespitosa (AK, WA, YK; 27; 1949-2005)
var. holciformis (WA; 2; 1963)
Deschampsia cespitosa (AK, BC, ID, MT, OR, WA, YK; 2299; 1846-2017)
ssp. beringensis (AK, BC, MT, OR, WA; 215; 1890-2013)
ssp. cespitosa (AK, BC, ID, MT, OR, WA, YK; 250; 1881-2017)
ssp. holciformis (BC, OR, WA; 12; 1892-2004)
Deschampsia danthonioides (BC, ID, MT, OR, WA; 547; 1881-2017)
Deschampsia elongata (AK, BC, ID, MT, OR, WA, YK; 1063; 1877-2017)
Deschampsia glauca (AK; 1; 1980)
Deschampsia latifolia (ID, WA; 2; 1882-1890)
Deschampsia sukatschewii (AK, ID, OR, YK; 25; 1922-2014)
Desmazeria
Desmazeria acutiflora (OR; 1; 1902)
Dichanthelium
Dichanthelium aciculare (ID; 1; 1959)
Dichanthelium acuminatum (BC, ID, MT, OR, WA; 521; 1881-2017)
ssp. acuminatum (BC, ID, MT, OR, WA; 115; 1887-2015)
ssp. fasciculatum (BC, ID, MT, OR, WA; 318; 1881-2015)
ssp. lindheimeri (WA; 1; 1905)
ssp. sericeum (ID, MT; 5; 1994-2017)
ssp. thermale (BC, ID; 10; 1941-1964)
var. densiflorum (MT; 1; 1887)
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; 266; 1880-2016)
ssp. scribnerianum (BC, ID, MT, OR, WA; 236; 1880-2016)
Dichanthelium scabriusculum (WA; 1; 1981)
Dichanthelium scoparium (MT; 1; 2016)
Dichanthelium wilcoxianum (MT; 6; 1977-2015)
Digitaria
Digitaria ischaemum (BC, ID, MT, OR, WA; 88; 1891-2014)
Digitaria sanguinalis (BC, ID, MT, OR, WA; 221; 1885-2016)
Digitaria villosa (OR; 1; 1900)
Diplachne
Diplachne fusca (BC, ID, MT, OR, WA; 56; 1887-2017)
ssp. fascicularis (BC, ID, MT, OR, WA; 50; 1924-2017)
ssp. uninervia (BC, OR, WA; 6; 1887-2002)
Distichlis
Distichlis spicata (BC, ID, MT, OR, WA; 712; 1863-2015)
var. dentata (WA; 1; 1971)
var. stricta (BC, OR, WA; 7; 1884-1947)
Duarctopoa
×Duarctopoa labradorica (AK; 10; 1992-2004)
Dupontia
Dupontia fisheri (AK, YK; 208; 1700-2014)
Echinochloa
Echinochloa colona (OR, WA; 5; 1900-2008)
Echinochloa crus-galli (BC, ID, MT, OR, WA; 559; 1882-2017)
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; 155; 1882-2017)
var. microstachya (BC, ID, MT, OR, WA; 141; 1882-2015)
var. microstachys (BC; 1; 2013)
var. muricata (WA; 1; 1894)
Ehrharta
Ehrharta erecta (BC, OR; 3; 1982-1997)
Eleusine
Eleusine coracana (WA; 2; 1897)
Eleusine indica (BC, MT, OR; 5; 1900-2008)
Eleusine tristachya (OR, WA; 6; 1898-1915)
Elyhordeum
×Elyhordeum jordalii (AK; 1; 1949)
×Elyhordeum macounii (AK, BC, ID, MT, OR, WA, YK; 103; 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
×Elyleymus aristatus (OR, WA; 49; 1901-1957)
×Elyleymus colvillensis (BC; 1; 2015)
×Elyleymus hirtiflorus (BC, ID; 2; 1938-2008)
×Elyleymus jamesensis (BC; 1; 1915)
×Elyleymus ontariensis (BC; 5; 1947-2001)
Elymordeum
×Elymordeum macounii (BC, YK; 4; 1947-2001)
Elymus
Elymus alaskanus (AK, BC, YK; 302; 1700-2016)
ssp. alaskanus (AK, BC, YK; 35; 1941-2016)
ssp. hyperarcticus (AK, YK; 9; 1943-2014)
var. latiglume (BC; 4; 1956-1975)
Elymus albicans (BC, ID, MT, OR, WA; 63; 1887-2016)
Elymus aristatus × Elymus macounii (MT; 1; 1955)
Elymus bakeri (ID, MT; 6; 1901-1953)
Elymus canadensis (BC, ID, MT, OR, WA; 353; 1887-2017)
var. brachystachys (BC; 1; 1976)
var. canadensis (BC, ID, MT, OR, WA; 135; 1889-2011)
var. robustus (ID, MT; 2; 1978)
Elymus canadensis × Elymus glaucus (OR, WA; 2; 1892-1914)
Elymus caninus (BC, ID, MT, OR, WA, YK; 64; 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; 1780; 1882-2017)
ssp. brevifolius (ID, MT, OR, WA; 162; 1890-2017)
ssp. californicus (BC, ID, MT, OR, WA; 227; 1897-2016)
ssp. elymoides (ID, OR, WA; 345; 1884-2015)
ssp. hordeoides (ID, OR, WA; 74; 1889-2011)
var. elymoides (ID, MT, OR, WA; 125; 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; 2134; 1875-2017)
ssp. glaucus (AK, BC, ID, MT, OR, WA, YK; 1220; 1875-2017)
ssp. virescens (AK, BC, ID, OR, WA; 74; 1893-2008)
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; 82; 1886-1995)
Elymus hirsutus (AK, BC, OR, WA; 144; 1900-2015)
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; 753; 1885-2017)
ssp. lanceolatus (BC, ID, MT, OR, WA; 335; 1886-2016)
ssp. psammophilus (AK, BC, OR, WA, YK; 64; 1886-2017)
ssp. riparius (BC, ID, MT, OR, WA; 140; 1885-2014)
var. lanceolatus (ID, MT, OR, WA; 88; 1895-2011)
Elymus lanceolatus × Elymus spicatus (ID; 3; 1975-1995)
Elymus lanceolatus × Elymus trachycaulus (ID; 1; 1989)
Elymus macrourus (AK, MT, YK; 86; 1901-2015)
Elymus multisetus (BC, ID, OR, WA; 179; 1890-2012)
Elymus ×palmerensis (AK; 3; 1947-1949)
Elymus ×pseudorepens (ID, MT; 8; 1897-2015)
Elymus repens (AK, BC, ID, MT, OR, WA, YK; 672; 1882-2016)
Elymus ×saundersii (BC, ID, MT, OR; 9; 1886-2011)
Elymus ×saxicolus (MT; 3; 1965-2008)
Elymus scribneri (BC, ID, MT, OR, WA; 199; 1883-2013)
Elymus semicostatus (AK, ID, OR, WA; 7; 1899-1941)
Elymus sibiricus (AK, BC, MT, WA, YK; 63; 1700-2015)
Elymus sierrae (OR; 1; 1938)
Elymus smithii (BC; 1; 1956)
var. molle (BC; 1; 1956)
Elymus spicata (BC; 3; 1948-1991)
ssp. inermis (BC; 3; 1948-1991)
Elymus spicatum (BC; 1; 1975)
var. inerme (BC; 1; 1975)
Elymus trachycaulis × Hordeum jubatum (ID; 3; 1937-1946)
Elymus trachycaulus (AK, BC, ID, MT, OR, WA, YK; 2237; 1700-2017)
ssp. majus (BC; 1; 1976)
ssp. subsecundus (AK, BC, ID, MT, OR, WA, YK; 247; 1883-2017)
ssp. trachycaulus (AK, BC, ID, MT, OR, WA, YK; 1161; 1882-2017)
Elymus trachycaulus × Elymus scribneri (BC, ID, MT, OR, WA, YK; 29; 1901-2000)
Elymus trachycaulus × Hordeum jubatum (ID, WA; 9; 1929-1967)
Elymus tsukushiensis (OR; 4; 1900-1903)
Elymus villosus (MT; 3; 2001-2009)
Elymus violaceus (AK, BC, ID, MT, OR, WA, YK; 374; 1884-2016)
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; 9; 1933-2012)
Elymus ×yukonensis (AK, BC, YK; 11; 1909-2005)
Elytrigia
Elytrigia intermedia × Elytrigia repens (ID; 1; 1941)
Elytrigia repens (BC; 1; 1976)
f. aristata (BC; 1; 1976)
Eragrostis
Eragrostis barrelieri (ID; 1; 1984)
Eragrostis cilianensis (BC, ID, MT, OR, WA; 226; 1887-2017)
Eragrostis curvula (OR, WA; 34; 1990-2015)
Eragrostis frankii (BC, OR; 2; 1925-2000)
Eragrostis hypnoides (ID, MT, OR, WA; 111; 1878-2017)
Eragrostis japonica (YK; 1; 1943)
Eragrostis lutescens (ID, OR, WA; 10; 1896-1980)
Eragrostis mexicana (BC, ID, OR, WA; 55; 1897-2015)
ssp. mexicana (BC, ID, WA; 4; 1897-2013)
ssp. virescens (BC, ID, OR, WA; 47; 1915-2015)
Eragrostis minor (BC, ID, MT, OR, WA; 86; 1922-2017)
Eragrostis pectinacea (BC, ID, MT, OR, WA; 242; 1894-2017)
var. miserrima (OR; 1; 2003)
var. pectinacea (BC, ID, MT, OR, WA; 122; 1894-2017)
Eragrostis pilosa (BC, ID, OR, WA; 38; 1900-2017)
var. pilosa (ID, OR, WA; 14; 1900-2017)
Eragrostis reptans (WA; 1; 1894)
Eragrostis tef (BC, MT; 9; 1990-2014)
Eragrostis trichodes (ID, WA; 3; 1897-1966)
Eragrostis unioloides (MT; 1; ?)
Eremopyrum
Eremopyrum orientale (BC; 3; 1995-2006)
Eremopyrum triticeum (BC, ID, MT, OR, WA; 144; 1912-2017)
Eriochloa
Eriochloa michauxii (MT; 2; 1970)
Eriochloa polystachya (WA; 1; 1913)
Erioneuron
Erioneuron avenaceum (MT; 1; 2016)
Fargesia
Fargesia spathacea (WA; 1; 2007)
Festuca
Festuca actoflora (WA; 3; 1976)
Festuca alaskanus (BC; 1; 2008)
ssp. alaskanus (BC; 1; 2008)
Festuca altaica (AK, BC, ID, YK; 581; 1909-2016)
Festuca ammobia (BC, OR; 28; 1926-2008)
Festuca arizonica (AK, ID; 2; 1945-1950)
Festuca auriculata (AK, YK; 8; 1960-2005)
Festuca baffinensis (AK, BC, ID, MT, YK; 211; 1897-2016)
Festuca brachyphylla (AK, BC, ID, MT, OR, WA, YK; 820; 1882-2017)
ssp. brachyphylla (ID, OR, WA, YK; 48; 1882-2013)
ssp. breviculmis (OR; 2; 1974-1980)
ssp. coloradensis (MT, OR, WA; 37; 1899-2008)
Festuca brevissima (AK, YK; 125; 1956-2015)
Festuca californica (OR; 85; 1886-2007)
ssp. californica (OR; 49; 1886-2002)
Festuca campestris (BC, ID, MT, OR, WA; 260; 1884-2014)
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; 14; 1921-2012)
Festuca hallii (BC, MT; 3; 1917-2011)
Festuca idahoensis (BC, ID, MT, OR, WA; 2033; 1881-2017)
Festuca kingii (ID; 2; 1945-1999)
Festuca lenensis (AK, YK; 72; 1939-2013)
Festuca minutiflora (AK, BC, MT, YK; 39; 1890-2008)
Festuca occidentalis (AK, BC, ID, MT, OR, WA; 884; 1881-2015)
Festuca ovina (AK, BC, ID, MT, OR, WA, YK; 147; 1882-2016)
ssp. eu-ovina (ID; 1; 1938)
ssp. ingrata (ID; 1; 1991)
ssp. rydbergii (BC; 1; 1990)
var. duriuscula (MT; 1; 1974)
var. sulcata (WA; 1; 1894)
Festuca paradoxa (OR; 1; 2004)
Festuca prolifera (BC; 3; 1980-1992)
Festuca richardsonii × Festuca rubra (BC; 1; 1975)
Festuca roemeri (BC, OR, WA; 298; 1881-2016)
var. klamathensis (OR; 69; 1899-2000)
var. roemeri (OR, WA; 85; 1881-2014)
Festuca rubra (AK, BC, ID, MT, OR, WA, YK; 2174; 1800-2017)
f. glabra (BC; 1; 1984)
ssp. arctica (AK, BC, YK; 60; 1932-2017)
ssp. arenaria (AK, BC, MT, OR, YK; 31; 1935-2007)
ssp. aucta (AK, BC; 9; 1932-1982)
ssp. commutata (AK, BC, OR, WA, YK; 16; 1964-2013)
ssp. fallax (BC, OR, WA, YK; 11; 1916-2010)
ssp. juncea (AK, BC, OR, WA; 82; 1882-2013)
ssp. mediana (BC, OR, WA; 63; 1882-2006)
ssp. rubra (AK, BC, ID, MT, OR, WA; 245; 1882-2016)
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; 526; 1881-2017)
var. purpusiana (BC, ID, MT, OR, WA, YK; 172; 1881-2017)
var. robertsiana (BC; 3; 1972-1981)
var. saximontana (AK, BC, ID, MT, OR, WA, YK; 201; 1883-2011)
Festuca scabrella (BC, ID, MT, OR, WA; 223; 1890-2011)
Festuca sciura (ID; 1; 1941)
Festuca subulata (AK, BC, ID, MT, OR, WA; 338; 1882-2017)
Festuca subuliflora (BC, ID, OR, WA; 162; 1890-2016)
Festuca trachyphylla (BC, ID, OR, WA, YK; 48; 1939-2010)
Festuca valesiaca (ID, OR, WA; 20; 1994-2015)
Festuca viridula (BC, ID, MT, OR, WA; 475; 1882-2017)
Festuca vivipara (AK, MT, YK; 30; 1950-2005)
Festuca viviparoidea (AK, BC, MT, YK; 57; 1936-2013)
ssp. krajinae (BC; 4; 1982-1997)
Festuca washingtonica (BC, WA; 47; 1932-2005)
Festulolium
Festulolium ×loliaceum (BC; 1; 1978)
Gastridium
Gastridium phleoides (OR; 70; 1887-2013)
Glyceria
Glyceria alnasteretum (AK; 2; 1945)
Glyceria borealis (AK, BC, ID, MT, OR, WA, YK; 512; 1884-2017)
Glyceria canadensis (BC, OR, WA; 23; 1929-2013)
var. canadensis (OR; 2; 1929-1999)
Glyceria declinata (BC, OR, WA; 37; 1964-2018)
Glyceria elata (BC, ID, MT, OR, WA; 799; 1807-2017)
var. swallen (BC; 1; 1941)
Glyceria elata × Glyceria grandis (BC; 1; 1940)
Glyceria fluitans (BC, OR, WA; 29; 1885-2008)
Glyceria gracilis (YK; 1; 1947)
Glyceria grandis (AK, BC, ID, MT, OR, WA, YK; 583; 1882-2017)
var. grandis (AK, BC, ID, MT, OR, WA, YK; 70; 1883-2017)
Glyceria leptostachya (AK, BC, ID, OR, WA; 135; 1883-2017)
Glyceria maxima (AK, BC, MT, WA, YK; 49; 1937-2012)
Glyceria nervata (OR; 1; 1924)
var. elata (OR; 1; 1924)
Glyceria ×occidentalis (BC, ID, OR, WA; 101; 1882-2016)
Glyceria pauciflora (OR; 1; 1907)
var. holmii (OR; 1; 1907)
Glyceria pulchella (AK, BC, YK; 56; 1899-2013)
Glyceria striata (AK, BC, ID, MT, OR, WA, YK; 832; 1881-2016)
Gnomonia
Gnomonia cerastis (BC; 1; 2009)
Gnomonia potentillae (BC; 1; 1952)
Gnomonia setacea (BC; 1; 1952)
Gnomonia veneta (BC, OR; 3; 1916-1934)
Graphephorum
Graphephorum wolfii (BC, ID, MT, OR, WA; 216; 1882-2017)
Hainardia
Hainardia cylindrica (OR; 3; 2005)
Hesperostipa
Hesperostipa comata (BC, ID, MT, OR, WA, YK; 997; 1881-2017)
ssp. comata (BC, ID, MT, OR, WA, YK; 538; 1881-2016)
ssp. intermedia (BC, ID, MT, OR, WA; 48; 1897-2008)
Hesperostipa curtiseta (BC, MT; 58; 1892-2011)
Hesperostipa spartea (BC, MT, OR, WA; 35; 1908-2011)
Hierochloe
Hierochloe alpina (AK, BC, ID, MT, WA, YK; 511; 1700-2016)
var. alpina (AK, BC, ID, MT, WA, YK; 41; 1931-2015)
var. orthantha (BC; 6; 1982)
Hierochloe annulata (AK; 2; 1993)
Hierochloe occidentalis (OR, WA; 85; 1875-2013)
Hierochloe odorata (AK, BC, ID, MT, OR, WA, YK; 520; 1800-2017)
Hilaria
Hilaria mutica (WA; 1; 1897)
Holcus
Holcus lanatus (AK, BC, ID, MT, OR, WA, YK; 695; 1882-2016)
var. albovirens (BC; 2; 1894)
var. colorata (BC; 2; 1915-1937)
var. colorate (BC; 1; 1916)
Holcus mollis (BC, ID, OR, WA; 60; 1921-2017)
ssp. mollis (WA; 1; 2007)
Hordeum
Hordeum brachyantherum (AK, BC, ID, MT, OR, WA, YK; 986; 1875-2017)
ssp. brachyantherum (AK, BC, ID, OR, WA; 129; 1875-2011)
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; 18; 1892-2006)
Hordeum discolor (BC, WA; 12; 1950-1994)
Hordeum filipes (OR; 1; 1985)
Hordeum jubatum (AK, BC, ID, MT, OR, WA, YK; 1170; 1884-2017)
ssp. intermedium (BC, ID, MT, OR, WA; 123; 1886-2017)
ssp. jubatum (BC, ID, MT, OR, WA, YK; 326; 1884-2017)
Hordeum marinum (BC, ID, MT, OR, WA; 203; 1884-2017)
ssp. gussoneanum (BC, ID, MT, OR, WA; 184; 1884-2015)
Hordeum murinum (BC, ID, OR, WA; 438; 1883-2017)
ssp. glaucum (BC, ID, OR, WA; 112; 1887-2011)
ssp. leporinum (BC, ID, OR, WA; 101; 1883-2007)
ssp. murinum (BC, ID, OR, WA; 57; 1897-2017)
Hordeum pusillum (BC, ID, MT, OR, WA; 52; 1892-2011)
Hordeum secalinum (OR; 1; 1928)
Hordeum vulgare (AK, BC, ID, MT, OR, WA; 74; 1889-2012)
ssp. vulgare (BC; 1; 1971)
var. vulgare (MT; 1; 2010)
Horedum
Horedum brachyantherum (BC, MT; 2; 1965-1968)
Imperata
Imperata ovata (OR; 1; 1899)
Koeleria
Koeleria asiatica (AK, YK; 50; 1956-2014)
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; 2198; 1876-2017)
Koeleria macratha (BC; 1; 1970)
Koeleria pyramidata (BC; 5; 1901-1918)
Koleria
Koleria macrantha (ID; 1; 1994)
Leersia
Leersia oryzoides (BC, ID, MT, OR, WA; 146; 1889-2017)
Leucopoa
Leucopoa kingii (ID, MT, OR; 316; 1885-2012)
Leydeum
×Leydeum dutillyanum (AK; 4; 1964)
Leymus
Leymus ambiguus (ID; 6; 1948-2002)
Leymus angustus (BC, YK; 5; 1998-2011)
Leymus arenarius (AK, BC, ID, WA; 8; 1939-2009)
Leymus chinensis (ID; 1; 1942)
Leymus cinereus (BC, ID, MT, OR, WA; 715; 1880-2017)
var. cinereus (WA; 2; 1983-1992)
Leymus condensatus (BC, ID, MT, OR, WA; 41; 1887-2015)
Leymus elymoides (WA; 1; 1965)
Leymus flavescens (ID, MT, OR, WA; 134; 1881-2015)
Leymus flavescens × Leymus triticoides (OR; 1; 2011)
Leymus innovatus (AK, BC, ID, MT, OR, WA, YK; 301; 1886-2016)
ssp. innovatus (BC; 2; 1977-1992)
ssp. velutinus (AK; 1; 2016)
Leymus mollis (AK, BC, MT, OR, WA, YK; 493; 1882-2017)
ssp. mollis (AK, BC, MT, OR, WA, YK; 109; 1882-2014)
ssp. villosissimus (AK, BC, YK; 25; 1949-2017)
Leymus multicaulis (OR; 1; 2002)
Leymus ×multiflorus (MT; 6; 1956-1977)
Leymus racemosus (ID, WA; 20; 1950-2013)
Leymus salina (ID, OR; 45; 1941-2010)
ssp. salina (ID; 3; 2010)
ssp. salmonis (ID, OR; 27; 1944-2010)
var. salmonis (ID; 1; 1962)
Leymus simplex (ID; 1; 1935)
Leymus triticoides (BC, ID, MT, OR, WA; 280; 1875-2012)
var. triticoides (ID; 1; 2009)
Leymus ×vancouverensis (BC, OR, WA; 54; 1889-2007)
Lolium
Lolium ×hybridum (BC; 1; 2007)
Lolium multiflorum (AK, BC, ID, MT, OR, WA, YK; 279; 1882-2014)
Lolium perenne (AK, BC, ID, MT, OR, WA, YK; 365; 1885-2016)
Lolium persicum (BC, MT; 27; 1954-2013)
Lolium rigidum (OR, WA; 4; 1902-1939)
Lolium temulentum (BC, ID, MT, OR, WA; 46; 1884-2010)
ssp. temulentum (BC, OR, WA; 25; 1887-2007)
Melica
Melica aristata (OR, WA; 22; 1883-2013)
Melica bulbosa (BC, ID, MT, OR, WA; 593; 1881-2017)
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; 173; 1881-2017)
Melica geyeri (OR, WA; 57; 1884-2016)
var. geyeri (OR; 33; 1884-2016)
Melica harfordii (BC, ID, OR, WA; 197; 1881-2014)
Melica smithii (BC, ID, MT, OR, WA; 74; 1892-2017)
Melica spectabilis (BC, ID, MT, OR, WA; 508; 1883-2017)
Melica stricta (ID, OR, WA; 40; 1885-2016)
var. stricta (OR; 16; 1885-2013)
Melica subulata (AK, BC, ID, MT, OR, WA; 706; 1877-2017)
Melinis
Melinis repens (ID, MT, OR; 5; 1914-2005)
Milium
Milium effusum (WA; 1; 2000)
Milium vernale (ID; 4; 1987-1988)
Miscanthus
Miscanthus sinensis (BC, OR, WA; 8; 2004-2018)
Molineriella
Molineriella laevis (OR; 1; 1956)
Molinia
Molinia caerulea (BC, OR; 9; 1962-2014)
Muhlenbergia
Muhlenbergia andina (BC, ID, MT, OR, WA; 45; 1879-2010)
Muhlenbergia asperifolia (BC, ID, MT, OR, WA; 327; 1881-2017)
var. parodi (ID; 1; 1939)
Muhlenbergia cuspidata (MT; 69; 1886-2010)
Muhlenbergia filiculmis (ID; 1; 1923)
Muhlenbergia filiformis (BC, ID, MT, OR, WA; 347; 1881-2017)
Muhlenbergia glomerata (BC, ID, MT, OR, WA, YK; 102; 1887-2012)
Muhlenbergia mexicana (BC, ID, MT, OR, WA; 88; 1889-2015)
ssp. virescens (BC; 1; 1998)
var. filiformis (ID, OR; 11; 1935-2013)
var. mexicana (BC, OR, WA; 12; 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; 456; 1882-2017)
Muhlenbergia rigens (OR; 1; 2005)
Muhlenbergia schreberi (WA; 2; 1897)
Muhlenbergia tacemosa (MT; 1; 1892)
Muhlenbergia uniflora (BC, OR; 7; 1997-2002)
Munroa
Munroa squarrosa (MT, OR; 49; 1891-2013)
Nardus
Nardus stricta (ID, OR; 9; 1960-2015)
Nassella
Nassella lepida (OR; 1; 1995)
Nassella tenuissima (BC, OR, WA; 11; 2007-2015)
Nassella viridula (BC, ID, MT, OR, WA; 346; 1887-2011)
Not
Not onagraceae (OR; 1; 1930)
Oryzopsis
Oryzopsis asperifolia (BC, ID, MT, WA, YK; 167; 1891-2012)
Oryzopsis hendersonii × Stipa lemmonii (WA; 1; 1967)
Panicum
Panicum acuminatum (OR; 1; 1999)
ssp. acuminatum (OR; 1; 1999)
Panicum capillare (BC, ID, MT, OR, WA; 581; 1881-2016)
ssp. capillare (BC, ID, MT, OR, WA; 220; 1881-2016)
Panicum dichotomiflorum (BC, ID, MT, OR, WA; 84; 1940-2017)
ssp. dichotomiflorum (BC, ID, OR, WA; 39; 1940-2017)
Panicum lanuginosum (MT; 1; 1964)
var. sericeum (MT; 1; 1964)
Panicum miliaceum (BC, ID, MT, OR, WA; 121; 1894-2016)
ssp. miliaceum (OR, WA; 22; 1917-2016)
ssp. ruderale (BC, OR; 21; 1993-2014)
Panicum occidenatle (WA; 1; 1984)
Panicum philadelphicum (BC; 1; 1944)
Panicum virgatum (ID, MT; 41; 1901-2015)
var. aridum (MT; 1; 1903)
Pappostipa
Pappostipa speciosa (OR; 4; 1985-1998)
Parapholia
Parapholia incurva (WA; 1; 2004)
Parapholis
Parapholis incurva (BC, OR, WA; 22; 1906-2017)
Parodiella
Parodiella fruticola (MT; 6; 1888)
Pascopyrum
Pascopyrum smithii (BC, ID, MT, OR, WA; 622; 1885-2017)
f. molle (BC; 1; 1995)
var. molle (BC; 1; 1948)
Paspalum
Paspalum dilatatum (AK, BC, OR; 40; 1885-2015)
Paspalum distichum (BC, ID, OR, WA; 123; 1885-2017)
Paspalum monostachyum (BC, ID; 3; 1951-1978)
Paspalum setaceum (MT; 2; 1938)
Pennisetum
Pennisetum alopecuroided (WA; 1; 2001)
Pennisetum ciliare (BC; 1; 1970)
Pennisetum glaucum (ID; 1; 1964)
Pennisetum setaceum (WA; 1; 2001)
Pennisetum villosum (OR; 2; 2005)
Phalaris
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; 956; 1875-2017)
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; 61; 1887-2013)
Phalaris caroliniana (OR; 8; 1884-1977)
Phalaris minor (OR; 10; 1900-1949)
Phalaris paradoxa (OR, WA; 10; 1903-2012)
Phippsia
Phippsia algida (AK, BC, MT, YK; 113; 1938-2015)
Phleum
Phleum alpinum (AK, BC, ID, MT, OR, WA, YK; 1350; 1863-2017)
ssp. alpinum (AK, BC, WA; 17; 1975-2009)
var. alpinum (ID, MT, OR, WA; 104; 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; 1167; 1883-2017)
ssp. pratense (BC, ID, MT, OR, WA; 53; 1885-2017)
var. pallida (BC; 1; 1972)
var. pratense (ID, MT, OR, WA; 299; 1895-2011)
Phleum subulatum (OR; 2; 1912)
Phragmites
Phragmites australis (BC, ID, MT, OR, WA; 306; 1877-2016)
ssp. americanus (BC, ID, OR, WA; 42; 1885-2015)
ssp. australis (BC, OR, WA; 45; 1877-2015)
Phyllostachys
Phyllostachys aurea (BC; 1; 2013)
Phyllostachys edulis (MT; 1; ?)
Piptatheropsis
Piptatheropsis canadensis (ID; 1; 1941)
Piptatheropsis exigua (BC, ID, MT, OR, WA; 411; 1883-2017)
Piptatheropsis micrantha (BC, ID, MT; 56; 1887-2013)
Piptatheropsis pungens (BC, YK; 28; 1943-2016)
Piptatheropsis shoshoneana (ID; 57; 1979-1992)
Pleuropogon
Pleuropogon hooverianus (OR, WA; 17; 1883-2000)
Pleuropogon oregonus (OR; 16; 1937-2013)
Pleuropogon refractus (BC, OR, WA; 129; 1881-2017)
Pleuropogon sabinei (AK, MT; 7; 1939-1982)
Poa
Poa abbreviata (AK, BC, ID, MT, OR, WA, YK; 133; 1887-2014)
ssp. abbreviata (YK; 1; 2000)
ssp. marshii (ID; 4; 1978-1979)
ssp. pattersonii (BC, ID, MT, OR, WA, YK; 98; 1887-2008)
Poa alpigena (AK; 9; 1950-1956)
var. vivipera (AK; 9; 1950-1956)
Poa alpina (AK, BC, ID, MT, OR, WA, YK; 1307; 1881-2016)
ssp. alpina (AK, BC, ID, MT, OR, WA, YK; 45; 1906-2008)
ssp. vivipara (AK; 2; 2002-2009)
var. alpina (MT; 30; 2002-2008)
Poa annua (AK, BC, ID, MT, OR, WA, YK; 671; 1878-2016)
Poa arctica (AK, BC, ID, MT, WA, YK; 1497; 1700-2015)
ssp. arctica (AK, BC, MT, YK; 209; 1897-2014)
ssp. caespitans (AK, BC; 3; 1983-2013)
ssp. grayana (BC, ID, MT, WA; 38; 1897-2008)
ssp. lanata (AK, BC, YK; 162; 1904-2014)
var. arctica (BC; 1; 2006)
var. vivipara (AK, YK; 4; 1941-2007)
var. williamsii (BC; 2; 1980)
Poa arctica × Poa stenantha (AK; 1; 2013)
Poa arctostepporum (AK; 5; 1992)
Poa arida (BC, ID, MT, WA; 125; 1887-2014)
Poa arnowiae (ID; 13; 1978-1999)
Poa bolanderi (ID, OR, WA; 83; 1882-2013)
Poa bulbosa (AK, BC, ID, MT, OR, WA; 1029; 1876-2017)
ssp. bulbosa (OR, WA; 4; 1927-2007)
ssp. vivipara (BC, ID, MT, OR, WA; 284; 1908-2017)
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; 16; 1914-2007)
Poa commutatum (YK; 1; 1970)
Poa compressa (AK, BC, ID, MT, OR, WA, YK; 797; 1882-2017)
ssp. interior (BC; 1; 2004)
Poa confinis (AK, BC, OR, WA; 121; 1882-2012)
Poa curtifolia (WA; 45; 1898-2012)
Poa cusickii (BC, ID, MT, OR, WA, YK; 1309; 1880-2017)
ssp. cusickii (BC, ID, MT, OR, WA; 248; 1882-2017)
ssp. epilis (BC, ID, MT, OR, WA; 471; 1881-2014)
ssp. pallida (BC, ID, MT, OR, WA, YK; 127; 1895-2012)
ssp. purpurascens (BC, ID, OR, WA; 147; 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; 55; 1916-1989)
Poa epilis (WA; 1; 1882)
var. purpurascens (WA; 1; 1882)
Poa fenderliana (BC; 4; 1915-2000)
ssp. longiligula (BC; 4; 1915-2000)
Poa fendleriana (BC, ID, MT, OR, WA; 470; 1885-2017)
ssp. fendleriana (BC, ID, MT; 26; 1913-2014)
ssp. longiligula (BC, ID, MT, OR, WA; 69; 1885-2017)
Poa glauca (AK, BC, ID, MT, OR, WA, YK; 1351; 1700-2017)
ssp. glauca (AK, BC, MT, OR, YK; 67; 1902-2015)
ssp. rupicola (AK, BC, ID, MT, OR, WA, YK; 226; 1900-2016)
var. glauca (ID; 8; 1993-1995)
var. pekulnejensis (AK; 1; 1993)
Poa glauca × Poa secunda (ID; 1; 1976)
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; 7; 1976-2013)
ssp. alaskana (AK; 3; 2001-2013)
Poa hendersoni (OR, WA; 2; 1882-1885)
Poa howellii (BC, OR, WA; 119; 1881-2016)
Poa infirma (BC, OR, WA; 31; 1902-2015)
Poa interior (AK, BC, ID, MT, OR, WA, YK; 715; 1884-2017)
Poa juncifolia × Poa sandbergii (WA; 1; 1972)
Poa kelloggii (BC, OR; 3; 1978)
Poa kellogii (ID; 2; 1949)
Poa lanata (BC; 5; 1982-1989)
ssp. lanata (BC; 4; 1982)
var. vivipara (BC; 1; 1989)
Poa laxa (ID, MT, OR; 4; 1900-1982)
Poa laxiflora (AK, BC, OR, WA; 91; 1881-2012)
Poa leibergii (ID, OR, WA; 188; 1877-2017)
Poa leptocoma (AK, BC, ID, MT, OR, WA, YK; 311; 1884-2016)
Poa lettermanii (BC, ID, MT, OR, WA; 87; 1889-2016)
Poa ×limosa (BC, OR; 5; 1901-2008)
Poa macrantha (AK, BC, OR, WA; 178; 1882-2013)
Poa macrocalyx (AK; 123; 1871-2015)
Poa malacantha (BC; 2; 1982)
ssp. lanata (BC; 2; 1982)
Poa marcida (BC, OR, WA; 73; 1882-2013)
Poa maximum (AK; 1; 2008)
Poa ×multnomae (OR, WA; 21; 1903-2016)
Poa ×nematophylla (BC, ID; 2; 1977-2006)
Poa nemoralis (AK, BC, ID, MT, OR, WA, YK; 139; 1884-2014)
var. nemoralis (BC; 1; 2008)
Poa nervosa (BC, ID, MT, OR, WA; 388; 1882-2017)
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; 1347; 1855-2016)
Poa pattersonii (ID; 3; 1937)
ssp. subcalva (ID; 3; 1937)
Poa paucispicula (AK, BC, ID, MT, OR, WA, YK; 385; 1889-2013)
Poa pglauca × Poa pratensis (BC; 1; 1983)
Poa piperi (OR; 39; 1887-2013)
Poa porsildii (AK, YK; 58; 1956-2005)
Poa pratensis (AK, BC, ID, MT, OR, WA, YK; 3350; 1876-2017)
ssp. agassizensis (BC, ID, MT, OR, WA; 46; 1916-2017)
ssp. alpigena (AK, BC, ID, MT, OR, WA, YK; 112; 1915-2016)
ssp. angustifolia (AK, BC, MT, WA, YK; 28; 1903-2006)
ssp. colpodea (AK, BC, YK; 18; 1953-2016)
ssp. irrigata (AK, BC, OR, WA; 40; 1904-2010)
ssp. latifolia (OR; 6; 1901-1959)
ssp. pratensis (AK, BC, ID, OR, WA, YK; 134; 1912-2014)
var. alpigena (AK; 1; 1941)
Poa pratensis × Poa trivialis (BC; 1; 1974)
Poa pratensis × Poa wheeleri (BC, MT, WA; 10; 1944-1996)
Poa pringlei (ID, OR, WA; 40; 1887-2012)
Poa pseudoabbreviata (AK, BC, YK; 106; 1939-2013)
Poa reflexa (BC, ID, MT, OR, WA; 156; 1886-2009)
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; 7032; 1876-2017)
ssp. juncifolia (BC, ID, MT, OR, WA, YK; 1392; 1881-2017)
ssp. junciformis (YK; 1; 2004)
ssp. nevadensis (WA; 7; 1897-1987)
ssp. secunda (AK, BC, ID, MT, OR, WA, YK; 3481; 1876-2017)
var. canbyi (ID; 1; 2001)
var. saxitilis (WA; 1; 1939)
var. secunda (ID, MT, OR, WA; 11; 1934-2014)
Poa serahina (MT; 1; 1895)
Poa stebbinsii (WA; 1; 1967)
Poa stenantha (AK, BC, ID, MT, OR, WA, YK; 292; 1882-2014)
var. stenantha (AK, BC, MT, OR, WA; 66; 1882-2014)
var. vivipara (AK; 2; 1940)
Poa sublanata (AK; 9; 2013-2014)
Poa suksdorfii (BC, OR, WA; 55; 1882-2013)
Poa supina (BC; 3; 2008-2013)
Poa sylvestris (OR; 1; 1937)
Poa trivialis (AK, BC, ID, MT, OR, WA, YK; 291; 1890-2016)
Poa unilateralis (OR, WA; 31; 1904-2010)
ssp. pachypholis (OR, WA; 12; 1904-1986)
ssp. unilateralis (OR; 5; 1936-1984)
Poa wallowensis (OR; 3; 1988-2001)
Poa wheeleri (BC, ID, MT, OR, WA; 954; 1882-2017)
Podagrostis
Podagrostis aequivalvis (AK, BC, OR, WA; 227; 1890-2009)
Podagrostis humilis (AK, BC, ID, MT, OR, WA, YK; 363; 1882-2015)
Podagrostis thurberiana (AK, BC, ID, MT, OR, WA; 394; 1882-2015)
Polypogon
Polypogon australis (OR, WA; 5; 1895-1918)
Polypogon fugax (OR, WA; 3; 1902-2016)
Polypogon interruptus (BC, OR, WA; 24; 1884-2013)
Polypogon maritimus (OR; 2; 2011-2014)
Polypogon monspeliensis (AK, BC, ID, MT, OR, WA; 623; 1883-2018)
Polypogon viridis (BC, OR, WA; 22; 1895-1991)
Polytrias
Polytrias indica (WA; 1; 1901)
Psathyrostachys
Psathyrostachys juncea (AK, BC, ID, MT, WA, YK; 42; 1939-2017)
Pseudelymus
Pseudelymus douglasii (WA; 1; 1900)
×Pseudelymus saxicola (BC, ID, MT, OR, WA; 46; 1897-2016)
Pseudoroegnaria
Pseudoroegnaria spicata (ID, MT, WA; 9; 1983-2017)
ssp. spicata (WA; 4; 2002-2006)
Pseudoroegneria
Pseudoroegneria spicata (AK, BC, ID, MT, OR, WA, YK; 2144; 1881-2017)
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
Pseudosasa japonica (BC, WA; 18; 1942-2014)
Puccinellia
Puccinellia andersonii (AK; 7; 1971-1983)
Puccinellia angustata (AK, YK; 6; 1977-2005)
Puccinellia arctica (AK; 2; 1953-1972)
Puccinellia borealis (AK, YK; 27; 1971-2015)
Puccinellia distans (AK, BC, ID, MT, OR, WA, YK; 250; 1901-2015)
Puccinellia fasciculata (OR; 1; 1999)
Puccinellia lemmonii (BC, ID, MT, OR, WA; 94; 1885-2015)
Puccinellia maritima (BC, WA; 7; 1979-1997)
Puccinellia nutkaensis (AK, BC, OR, WA; 239; 1886-2014)
Puccinellia nuttalliana (AK, BC, ID, MT, OR, WA, YK; 402; 1887-2017)
Puccinellia phryganodes (AK, YK; 64; 1959-2013)
Puccinellia phyrganodes (AK; 1; 1977)
Puccinellia pumila (AK, BC, OR, WA; 96; 1887-2014)
Puccinellia tenella (AK, YK; 23; 1932-2015)
ssp. langeana (AK, YK; 13; 1974-2015)
Puccinellia tenuiflora (OR; 4; 1905-1906)
Puccinellia vaginata (AK, YK; 21; 1977-2017)
Puccinellia vahliana (AK, YK; 12; 1957-2006)
Puccinellia wrightii (AK; 21; 1945-2013)
ssp. wrightii (AK; 3; 2013)
Redfieldia
Redfieldia flexuosa (OR, WA; 3; 1936-1993)
Roegneria
Roegneria turuchanensis (AK; 1; 1992)
Roegneria villosa (AK; 1; 1992)
Rostraria
Rostraria cristata (OR, WA; 5; 1903-1916)
Rytidosperma
Rytidosperma biannulare (OR; 1; 1945)
Rytidosperma penicillatum (OR; 4; 1945-2006)
Saccharum
Saccharum baldwinii (MT; 1; 1928)
Sasa
Sasa palmata (BC, WA; 9; 1986-2017)
Schedolium
×Schedolium braunii (BC; 2; 1978)
×Schedolium holmbergii (OR; 1; 2006)
×Schedolium loliaceum (BC; 1; 2005)
Schedonnardus
Schedonnardus paniculatus (BC, MT; 93; 1888-2011)
Schedonorus
Schedonorus arundinaceus (AK, BC, ID, MT, OR, WA, YK; 416; 1886-2016)
Schedonorus pratensis (AK, BC, ID, MT, OR, WA; 297; 1882-2012)
Schizachne
Schizachne purpurascens (AK, BC, ID, MT, WA, YK; 83; 1889-2014)
Schizachyrium
Schizachyrium scoparium (BC, ID, MT, WA; 156; 1886-2015)
var. scoparium (MT, WA; 72; 1900-2015)
var. stoloniferum (WA; 1; 2012)
Sclerochloa
Sclerochloa dura (BC, ID, MT, OR, WA; 105; 1932-2015)
Scleropoa
Scleropoa rigida (OR; 9; 1916-1921)
Scolochloa
Scolochloa festucacea (AK, BC, ID, MT, OR, WA; 27; 1927-2012)
Scribneria
Scribneria bolanderi (OR, WA; 25; 1884-2012)
Secale
Secale cereale (AK, BC, ID, MT, OR, WA, YK; 167; 1889-2017)
Secale strictum (OR, WA; 5; 1927-2004)
Setaria
Setaria faberi (BC, OR, WA; 6; 1998-2016)
Setaria italica (BC, MT, OR, WA; 19; 1885-2007)
Setaria magna (WA; 1; 1937)
Setaria parviflora (OR; 2; 1916-1969)
Setaria pumila (BC, ID, MT, OR, WA; 146; 1895-2017)
ssp. pallidefusca (BC, OR; 5; 1900-2007)
ssp. pumila (BC, ID, MT, OR, WA; 115; 1895-2017)
Setaria verticillata (BC, ID, MT, OR, WA; 39; 1938-2015)
Setaria ×verticilliformis (BC; 2; 1947)
Setaria viridis (AK, BC, ID, MT, OR, WA, YK; 400; 1887-2017)
ssp. viridis (OR; 1; 2006)
var. major (OR, WA; 5; 1920-2002)
var. viridis (BC, OR, WA; 55; 1900-2017)
Sitanion
Sitanion jubatum (OR; 1; 1908)
var. californicum (OR; 1; 1908)
Sorghum
Sorghum bicolor (BC, ID, MT, OR, WA; 37; 1917-2015)
Sorghum ×drummondii (ID; 1; 1932)
Sorghum halepense (BC, ID, MT, OR, WA; 42; 1890-2017)
Spartina
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; 268; 1884-2014)
Spartina patens (BC, OR, WA; 16; 1977-2005)
Spartina pectinata (BC, ID, MT, OR, WA; 135; 1886-2015)
Spartina ×townsendii (BC, WA; 5; 1965-2006)
Sphenopholis
Sphenopholis filiformis (WA; 1; 1902)
Sphenopholis intermedia (AK, BC, MT, OR, WA, YK; 62; 1884-2015)
Sphenopholis obtusata (BC, ID, MT, OR, WA; 92; 1883-2015)
Sphenopholis ×pallens (WA; 3; 1892-1902)
Sporobolus
Sporobolus airoides (BC, ID, MT, OR, WA; 142; 1890-2017)
var. oblongifolia (BC; 1; 2001)
Sporobolus brevifolius (MT; 1; ?)
Sporobolus compositus (BC, ID, MT, WA; 33; 1939-2014)
var. compositus (BC, WA; 21; 1996-2014)
Sporobolus cryptandrus (BC, ID, MT, OR, WA; 305; 1877-2017)
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; 23; 1982-2014)
var. vaginiflorus (BC; 9; 2002-2011)
Stipa
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 (MT, OR, WA; 9; 1897-2001)
var. idahoensis (OR; 4; 1907)
Stipa occidentalis × Stipa thurberiana (OR; 1; 1946)
Taeniatherum
Taeniatherum caput-medusae (ID, MT, OR, WA; 210; 1884-2016)
Teaniatherum
Teaniatherum caput-medusae (OR; 1; 2002)
Thinopyrum
Thinopyrum elongatum (BC, ID, MT, WA; 16; 1948-2012)
Thinopyrum intermedium (BC, ID, MT, OR, WA, YK; 272; 1889-2015)
ssp. barbulatum (BC, ID, MT, OR, WA; 47; 1953-2015)
ssp. intermedium (BC, ID, OR, WA; 44; 1893-2015)
var. intermedium (ID; 2; 2009)
Thinopyrum junceum (OR; 7; 1911-1925)
Thinopyrum ponticum (BC, ID, MT, OR, WA, YK; 103; 1927-2016)
Thinopyrum pungens (BC; 1; 1987)
Thinopyrum pycnanthum (OR; 1; 1919)
Thynopyrum
Thynopyrum intermedium (WA; 1; 1902)
Torreyochloa
Torreyochloa erecta (OR; 25; 1896-2005)
Torreyochloa pallida (AK, BC, ID, MT, OR, WA, YK; 760; 1875-2017)
var. fernaldii (BC; 1; 1977)
var. pallida (WA; 2; 1892-1999)
var. pauciflora (AK, BC, ID, MT, OR, WA, YK; 734; 1875-2017)
Torreyochloa pauciflora (BC; 2; 1980-1990)
ssp. pauciflora (BC; 1; 1990)
var. holmii (BC; 1; 1980)
Tridens
Tridens albescens (WA; 1; ?)
Tridens flavus (ID, MT; 2; 1897-1900)
Tridens muticus (ID; 1; 1999)
Tripidium
Tripidium ravennae (ID, OR, WA; 11; 2011-2017)
Triplasis
Triplasis purpurea (OR, WA; 23; 1990-2016)
var. purpurea (OR; 1; 2008)
Trisetum
Trisetum canescens (AK, BC, ID, MT, OR, WA; 555; 1882-2015)
Trisetum cernuum (AK, BC, ID, MT, OR, WA; 482; 1882-2016)
f. pubescens (ID, OR, WA; 5; 1890-1927)
var. pubescens (WA; 4; 1889-1933)
Trisetum flavescens (BC, ID, OR, WA; 8; 1898-1985)
Trisetum orthochaetum (MT; 9; 1949-1994)
Trisetum sibiricum (AK, YK; 10; 1960-2008)
Trisetum spicatum (AK, BC, ID, MT, OR, WA, YK; 2402; 1700-2017)
ssp. molle (BC; 17; 1961-1971)
var. molle (WA; 7; 1896-1933)
var. stricta (BC; 1; 1989)
Triticum
Triticum aestivum (AK, BC, ID, MT, OR, WA; 155; 1882-2017)
Uniola
Uniola paniculata (BC; 1; 2001)
Urochloa
Urochloa mutica (AK, OR; 2; 1915-1977)
Vahlodea
Vahlodea atropurpurea (AK, BC, ID, MT, OR, WA, YK; 883; 1881-2013)
Ventenata
Ventenata dubia (BC, ID, MT, OR, WA; 248; 1957-2017)
Vulpia
Vulpia bromoides (BC, ID, MT, OR, WA; 435; 1889-2017)
Vulpia microstachys (BC, ID, MT, OR, WA; 724; 1880-2017)
var. ciliata (ID, WA; 4; 1909-1975)
var. confusa (ID, OR, WA; 29; 1883-1962)
var. microstachys (BC, ID, OR, WA; 22; 1902-2013)
var. pauciflora (BC, ID, OR, WA; 248; 1880-2017)
Vulpia myuros (BC, ID, MT, OR, WA; 513; 1875-2013)
Vulpia octoflora (BC, ID, MT, OR, WA; 462; 1877-2017)
var. hirtella (BC, ID, MT, OR, WA; 32; 1883-2017)
var. octoflora (BC, ID, MT, OR, WA; 110; 1883-2011)
var. tenella (BC, MT, WA; 23; 1892-2014)
Zea
Zea mays (BC, ID, MT, WA; 13; 1956-2011)
ssp. mays (BC, WA; 7; 2005-2011)
Zizania
Zizania aquatica (BC, ID, WA; 17; 1932-2004)
var. aquatica (BC, WA; 3; 2004)
Zizania palustris (BC, ID, MT, OR, WA; 33; 1927-2009)
var. interior (BC, ID; 6; 1927-2009)
var. palustris (BC, ID, OR, WA; 9; 1934-2006)