Vascular Plants of Washington
Asteraceae
Asteraceae
Generated from PNW Herbaria database
November 28, 2020.
165 genus names
915 species/infraspecies names
(names highlighted in brown could not be resolved to an accepted name)
Index to Genera:
A: Achillea, Adenocaulon, Ageratina, Agoseris, Ambrosia, Anaphalis, Anisocarpus, Antennaria, Anthemis, Aplopappus, Arctium, Arnica, Artemisia, Askellia, Aster
B: Baccharis, Balsamorhiza, Bellis, Bidens, Blepharipappus, Blepharopappus, Boltonia, Borrichia, Bradburia, Brickellia
C: Cacaliopsis, Calendula, Callistephus, Canadanthus, Carduus, Carthamus, Centaurea, Centromadia, Chaenactis, Chondrilla, Chrysanthemum, Chrysothamnus, Cichorium, Cirsium, Coleosanthus, Columbiadoria, Conyza, Conzya, Coreopsis, Cosmos, Cota, Cotula, Crepis, Crocidium, Crupina, Cyclachaena, Cynara
E: Eatonella, Echinops, Eclipta, Elephantopus, Erechtites, Ericameria, Erigeron, Eriophyllum, Eucephalus, Eurybia, Euthamia, Eutrochium
G: Gaertneria, Gaillardia, Galinsoga, Gamochaeta, Glebionis, Gnaphalium, Grindelia, Guizotia, Gutierrezia
H: Haplopappus, Harpaecarpus, Helenium, Helianthella, Helianthus, Hemizonella, Heterotheca, Hieracium, Hoorebekia, Hulsea, Hymenopappus, Hymenoxys, Hypochaeris
L: Lactuca, Lagophylla, Lapsana, Lapsona, Lasthenia, Layia, Leontodon, Leucanthemum, Logfia, Luina, Lygodesmia
O: Onopordum, Oreostemma
P: Packera, Parthenium, Petasites, Picris, Plectocephalus, Pleiacanthus, Prenanthes, Pseudognaphalium, Psilocarphus, Ptilocalis, Ptilonella, Ptiloria, Pyrrhopappus, Pyrrocoma
S: Santolina, Saussurea, Scorzonella, Senecio, Sericocarpus, Silybum, Solidago, Soliva, Sonchus, Stenotus, Stephanomeria, Symphyotrichum
T: Tanacetum, Taraxacum, Tetradymia, Tonestus, Townsendia, Tragopogon, Tripleurospermum, Trixis, Troximon, Tussilago
U: Uropappus
V: Verbesina
W: Wyethia
Z: Zinnia,
Achillea filipendulina (IDE; 12; 1991)
Achillea millefolium (EVE, EWU, HPSU, ID, IDS, LEA, LINF, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, UWB, V, WCW, WS, WSTC, WTU, WWB; 798; 1883-2019)
Adenocaulon bicolor (EWU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, REED, RM, WCW, WS, WTU, WWB; 189; 1882-2019)
Ageratina aromatica (WS; 1; 1915)
Ageratina occidentalis (PNNL, PSM, WS, WTU; 15; 1886-2009)
Agoseris ×agrestis (ID, WTU, WWB; 3; 1895-2000)
Agoseris apargioides (EWU, HPSU, MONT, PLU, REED, WCW, WS, WTU; 19; 1892-2008)
var. maritima (WS, WTU; 6; 1904-2008)
Agoseris aurantiaca (EWU, HPSU, ID, IDS, NOCA, OSC, PLU, PSM, RM, SRP, WCW, WS, WTU, WWB; 320; 1880-2019)
var. aurantiaca (EWU, HPSU, ID, NOCA, OSC, PLU, SRP, WS, WTU; 226; 1880-2016)
var. carnea (OSC, WTU; 12; 1933-2017)
var. purpurea (WWB; 1; 1971)
Agoseris ×elata (OSC, PLU, PSM, WS, WTU, WWB; 29; 1885-2009)
Agoseris glauca (EWU, ID, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, WCW, WS, WTU, WWB; 298; 1882-2018)
ssp. taraxacifolia (WTU; 2; 1892)
var. dasycephala (EWU, ID, NOCA, NY, OSC, PLU, RM, SRP, UBC, WCW, WS, WTU, WWB; 172; 1882-2012)
var. glauca (ID, NY, OSC, RM, WS, WTU; 63; 1882-2015)
var. scorzonerifolia (WTU; 1; 1892)
Agoseris gracilenta (EWU; 1; 1916)
Agoseris grandiflora (BLMMD, CIC, EWU, ID, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, V, WS, WTU, WWB; 140; 1881-2019)
var. grandiflora (WS, WTU; 60; 1881-2019)
var. leptophylla (CIC, WS, WTU; 7; 1896-2018)
Agoseris heterophylla (EWU, HPSU, ID, IDS, NOCA, NY, OSC, PLU, PNNL, PSM, REED, RM, UBC, V, WCW, WS, WTU, WWB; 219; 1880-2018)
var. heterophylla (HPSU, ID, IDS, NOCA, NY, OSC, RM, UBC, WS, WTU, WWB; 145; 1880-2018)
Agoseris monticola (RM, WS, WTU; 13; 1880-1996)
Agoseris parviflora (OSC; 1; ?)
Agoseris retrorsa (MONT, NOCA, OSC, PSM, WS, WTU, WWB; 48; 1884-2013)
Ambrosia acanthicarpa (ID, IDE, IDS, OSC, PNNL, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 74; 1880-2018)
Ambrosia artemisiifolia (ID, OSC, UBC, WCW, WS, WSTC, WTU, WWB; 33; 1894-2018)
ssp. diversifolia (WS; 1; 1896)
Ambrosia chamissonis (HPSU, ID, MONT, OSC, PLU, PSM, SRP, WCW, WS, WTU, WWB; 126; 1883-2020)
Ambrosia psilostachya (ID, OSC, WS, WTU; 8; 1897-2015)
Ambrosia trifida (IDE, WS, WTU; 5; 1907-2007)
Anaphalis margaritacea (EWU, HPSU, ID, LEA, LINF, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, UWB, V, WCW, WS, WSTC, WTU, WWB; 457; 1880-2020)
Anisocarpus madioides (ID, LINF, MONT, OSC, PLU, WS, WTU, WWB; 73; 1888-2011)
Antennaria alpina (IDS, NOCA, OSC, WCW, WS, WTU, WWB; 47; 1882-2020)
Antennaria anaphaloides (ID, IDS, NOCA, OSC, RM, WS, WTU, WWB; 85; 1882-2019)
Antennaria argentea (EWU, WTU; 2; 1953-1986)
Antennaria corymbosa (OSC, WS, WTU; 9; 1972-2017)
Antennaria dimorpha (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PNNL, PSM, RM, UBC, V, WCW, WS, WSTC, WTU, WWB; 234; 1829-2019)
Antennaria dioica (MONT; 1; 1935)
Antennaria flagellaris (CIC, EWU, ID, OSC, UBC, WS, WTU, WWB; 49; 1884-2015)
Antennaria geyeri (HPSU, ID, OSC, WS, WTU, WWB; 23; 1880-2012)
Antennaria howellii (EVE, EWU, HPSU, ID, NOCA, NY, OSC, PLU, RM, SRP, UBC, WS, WTU, WWB; 105; 1879-2020)
ssp. howellii (HPSU, ID, NOCA, OSC, PLU, RM, SRP, WS, WTU, WWB; 57; 1880-2019)
ssp. neodioica (EVE, ID, NOCA, NY, OSC, RM, UBC, WS, WTU, WWB; 38; 1879-2019)
var. howellii (WS; 1; 1949)
Antennaria lanata (EWU, HPSU, ID, MONT, MORA, NOCA, OSC, PLU, PSM, REED, UBC, V, WS, WSTC, WTU, WWB; 178; 1879-2019)
Antennaria luzuloides (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, REED, RM, UBC, WCW, WS, WTU, WWB; 230; 1878-2019)
ssp. aberrans (HPSU, WS; 2; 1968-1998)
ssp. luzuloides (EWU, UBC, WS, WTU; 73; 1880-2018)
Antennaria media (CIC, EWU, ID, IDE, NOCA, OSC, PSM, RM, UBC, WS, WTU, WWB; 70; 1892-2017)
Antennaria microphylla (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, WS, WTU, WWB; 542; 1877-2020)
Antennaria neglecta (ID, NOCA, PLU, PSM, RM, SRP, WS, WTU; 80; 1888-2016)
Antennaria neodioica (OSC; 2; 1882-1904)
var. howellii (OSC; 2; 1882-1904)
Antennaria parlinii (WTU; 1; 2008)
ssp. fallax (WTU; 1; 2008)
Antennaria parvifolia (ID, IDS, OSC, RM, UBC, WS, WTU; 42; 1896-2011)
Antennaria plantaginifolia (PLU; 1; 1908)
Antennaria pulcherrima (WS, WTU; 15; 1892-1978)
Antennaria racemosa (CIC, EWU, HPSU, ID, IDS, MONT, NOCA, NY, OSC, PLU, PSM, REED, RM, UBC, WS, WTU, WWB; 283; 1880-2020)
Antennaria rosea (RM; 1; 1900)
var. divaricata (RM; 1; 1900)
Antennaria stenophylla (ID, OSC, PLU, PSM, RM, SRP, WS, WTU, WWB; 65; 1880-2015)
Antennaria suffrutescens (EWU; 1; 1953)
Antennaria umbrinella (ID, IDS, NOCA, OSC, PLU, RM, UBC, WS, WTU, WWB; 121; 1885-2017)
Anthemis arvensis (ID, NOCA, PLU, PSM, WS, WSTC, WTU; 41; 1883-2014)
Anthemis cotula (EWU, ID, LINF, MONT, NOCA, OSC, PLU, PSM, REED, UBC, USFS, UWB, WCW, WS, WSTC, WTU, WWB; 135; 1888-2018)
Aplopappus bloomeri (WTU; 3; 1899-1933)
var. sonnei (WTU; 1; 1933)
Aplopappus greenei (WTU; 1; 1926)
Aplopappus lanuginosus (WTU; 4; 1932-1934)
Aplopappus resinosus (EWU, WTU; 3; 1935-1937)
Aplopappus stenophyllus (WTU; 6; 1896-1940)
Arctium lappa (NOCA, USFS, WS, WTU, WWB; 11; 1914-2014)
Arctium minus (NOCA, OSC, PLU, PSM, SRP, USFS, UWB, WCW, WS, WSTC, WTU, WWB; 82; 1894-2019)
Arnica alpina (OSC; 3; 1879-1924)
Arnica angustifolia (ID; 1; 1940)
ssp. angustifolia (ID; 1; 1940)
Arnica aurantiaca (EWU, OSC; 2; 1918-1933)
Arnica betonicaefolia (OSC, WTU; 2; 1931)
Arnica betonicifolia (WCW, WS; 5; 1895-1969)
Arnica chamissonis (OSC, PLU, PSM, WS, WTU, WWB; 27; 1879-1996)
Arnica cordata (WS, WTU; 2; 1949-1973)
Arnica cordifolia (EWU, HPSU, ID, IDS, LEA, MONT, NOCA, OSC, PLU, PSM, REED, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 383; 1881-2019)
Arnica discoidea (PLU, PSM, UBC, WS, WTU, WWB; 17; 1885-2005)
Arnica eradiata (EWU, WTU; 2; 1916-1929)
Arnica falconaria (NY, WS; 2; 1892)
Arnica fulgens (EWU, ID, NOCA, OSC, PLU, PSM, SRP, V, WS, WSTC, WTU; 78; 1883-2019)
Arnica gracilis (ID, IDS, NOCA, OSC, PLU, RM, V, WCW, WS, WTU, WWB; 50; 1897-2018)
Arnica hirticaulis (NY, WS; 3; 1907-1909)
Arnica lanceolata (EWU, MONT, NOCA, OSC, PLU, PSM, REED, SRP, UBC, WS, WTU, WWB; 129; 1882-2020)
ssp. prima (EWU, MONT, NOCA, OSC, PLU, PSM, REED, SRP, UBC, WS, WTU, WWB; 129; 1882-2020)
Arnica latifolia (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PSM, REED, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 378; 1883-2017)
Arnica longifolia (NOCA, PLU, PSM, V, WS, WSTC, WTU, WWB; 32; 1885-2015)
Arnica macounii (OSC, WTU; 6; 1892-1934)
Arnica mollis (EWU, HPSU, ID, IDS, NOCA, OSC, PLU, PSM, REED, SRP, UBC, WS, WSTC, WTU, WWB; 194; 1882-2019)
ssp. genuina (WTU; 7; 1930-1942)
var. genuina (WTU; 6; 1882-1932)
Arnica nevadensis (NOCA, OSC, WS, WTU, WWB; 23; 1901-2014)
Arnica ovata (NOCA, OSC, PLU, PSM, REED, UBC, WS, WSTC, WTU, WWB; 49; 1892-2006)
Arnica parryi (EWU, ID, MONT, NOCA, OSC, PLU, PSM, RM, SRP, UBC, V, WS, WTU, WWB; 111; 1882-2017)
Arnica platyphylla (NY, RM; 2; 1893)
Arnica rivularis (EWU, REED; 2; 1916)
Arnica rydbergii (ID, NOCA, PSM, UBC, WS, WTU, WWB; 69; 1896-2011)
Arnica sororia (EWU, ID, IDS, NOCA, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 132; 1889-2018)
Artemisia absinthium (EWU, ID, IDE, MONT, NOCA, OSC, PLU, RM, UBC, USFS, WS, WTU, WWB; 75; 1901-2019)
Artemisia annua (IDE, NOCA; 5; 1986-1989)
Artemisia arbuscula (OSC, WS, WTU; 11; 1898-2014)
ssp. arbuscula (OSC, WS, WTU; 10; 1898-2014)
Artemisia biennis (ID, IDE, MONT, NOCA, OSC, WCW, WS, WTU, WWB; 38; 1883-2016)
Artemisia borealis (WS; 4; 1878-1896)
var. wormskioldii (WS; 4; 1878-1896)
Artemisia campestris (HPSU, ID, MONT, NOCA, OSC, PNNL, PSM, SRP, V, WS, WTU, WWB; 111; 1885-2013)
var. borealis (ID, V, WS, WTU, WWB; 25; 1931-1996)
var. canadensis (WS; 3; 1895-1932)
var. caudata (OSC, WS, WTU, WWB; 8; 1921-1992)
var. scouleriana (ID, NOCA, OSC, PNNL, SRP, WS, WTU; 56; 1885-2013)
var. wormskioldii (PNNL, WTU; 5; 1896-1989)
Artemisia cana (RM, WS, WTU; 7; 1970-2005)
ssp. bolanderi (WS; 3; 1970)
ssp. cana (RM; 1; 1996)
ssp. viscidula (WS; 1; 1972)
Artemisia douglasiana (ID, MONT, OSC, PNNL, PSM, RM, SRP, UBC, WS, WTU, WWB; 57; 1879-2019)
Artemisia dracunculus (ID, NOCA, OSC, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 62; 1879-2014)
Artemisia frigida (NOCA, OSC, WS, WTU; 7; 1902-1994)
Artemisia furcata (ID, MORA, NOCA, PSM, UBC, WS, WTU, WWB; 34; 1897-2007)
Artemisia leibergii (NY; 1; 1894)
Artemisia ludoviciana (EWU, HPSU, ID, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 379; 1889-2019)
ssp. candicans (ID, NOCA, OSC, RM, UBC, WS, WTU, WWB; 68; 1892-2019)
ssp. incompta (ID, NOCA, NY, RM, WS, WTU; 50; 1892-2019)
ssp. lindleyana (EWU, HPSU, ID, OSC, PNNL, PSM, SRP, UBC, WS, WSTC, WTU, WWB; 77; 1892-2006)
ssp. ludoviciana (EWU, ID, NOCA, OSC, PLU, PNNL, RM, UBC, WS, WSTC, WTU, WWB; 93; 1890-2018)
Artemisia michauxiana (HPSU, NOCA, OSC, RM, SRP, V, WCW, WS, WTU, WWB; 98; 1881-2020)
Artemisia norvegica (ID, NOCA, OSC, PLU, UBC, V, WS, WTU, WWB; 41; 1897-2015)
ssp. saxatilis (ID, NOCA, OSC, PLU, WS, WTU, WWB; 31; 1897-2015)
Artemisia nova (CIC; 1; 2009)
Artemisia platyphylla (NY; 1; 1897)
Artemisia rigida (EWU, ID, MONT, OSC, PNNL, RM, SRP, WS, WTU, WWB; 72; 1889-2014)
Artemisia spiciformis (RM, WTU; 3; 1903-2001)
Artemisia stelleriana (ID, OSC, WS, WTU; 5; 1921-2017)
Artemisia suksdorfii (ID, MONT, NOCA, OSC, PLU, PSM, SRP, UBC, WS, WTU, WWB; 97; 1883-2017)
Artemisia tilesii (EWU, ID, NOCA, OSC, PLU, PSM, UBC, V, WS, WTU, WWB; 66; 1882-2012)
Artemisia tridentata (EWU, ID, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 274; 1869-2019)
ssp. tridentata (ID, MONT, OSC, RM, SRP, UBC, WS, WTU; 85; 1869-2019)
ssp. vaseyana (ID, MONT, NY, OSC, RM, UBC, WS, WTU; 29; 1889-2014)
ssp. wyomingensis (WTU; 5; 2012-2017)
var. pubescens (WTU; 1; 1925)
Artemisia tripartita (CIC, EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PNNL, UBC, WS, WTU, WWB; 57; 1889-2017)
ssp. tripartita (HPSU, UBC, WS, WTU; 29; 1889-2013)
Artemisia vulgaris (IDE, NY, OSC, PLU, PSM, RM, SRP, UWB, WS, WTU; 34; 1890-2004)
ssp. gnaphalodes (WTU; 1; 1946)
var. gnaphalodes (WTU; 1; 1893)
var. litoralis (NY; 1; 1890)
Artemisia websteri (MONT; 1; 1931)
Askellia pygmaea (CIC, NOCA, OSC, WCW, WS, WTU, WWB; 31; 1898-2012)
Aster alpinus (PLU; 1; 1975)
Aster ascendens × Aster eatonii (WTU; 1; 1949)
Aster ascendens × Aster foliaceus (WTU; 1; 1949)
Aster ascendens × Aster laevis (WTU; 1; 1936)
Aster bakerensis (WS; 1; 1923)
Aster brevibracteatus (NY, WS; 2; 1889)
Aster chilensis (WTU; 1; 1996)
var. adscendens (WTU; 1; 1996)
Aster chilensis × Aster subspicatus (WTU; 1; 1943)
Aster eatoni × Aster subspicatus (WTU; 3; 1902-1933)
Aster eatonii × Aster foliaceus (WTU; 1; 1903)
Aster engelmannii (WTU; 17; 1892-1958)
var. engelmannii (WTU; 17; 1892-1958)
Aster foliaceus (NOCA, WTU; 20; 1882-2002)
ssp. foliaceus (WTU; 17; 1882-1953)
ssp. parryi (WTU; 1; 1892)
Aster foliaceus × Aster occidentalis (WTU; 3; 1893-1940)
Aster hallii × Aster subspicatus (WTU; 1; 1999)
Aster humistratus (NY, WS; 2; 1905)
Aster idahoensis (WTU; 2; 1893-1933)
Aster intermedius (WTU; 9; 1886-1935)
Aster laevis × Aster subgriseus (WTU; 1; 1893)
Aster occidentalis × Aster subspicatus (WTU; 1; 1931)
Aster oregonus (MONT; 1; 1926)
Aster pickettiana (WS; 2; 1916)
Aster pulchellus (EWU, WWB; 2; 1891-1930)
Aster wattii (WS; 1; 1895)
Baccharis pilularis (OSC, WS, WTU; 8; 1990-2016)
ssp. consanguinea (WTU; 1; 2016)
Balsamorhiza balsamorhiza (WTU; 2; 1902-1971)
Balsamorhiza ×bonseri (WS; 11; 1924-1939)
Balsamorhiza careyana (CIC, EWU, ID, IDS, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, SRP, UBC, V, WCW, WS, WSTC, WTU; 219; 1882-2015)
Balsamorhiza careyana × Balsamorhiza deltoidea (WS, WTU; 5; 1892-1942)
Balsamorhiza careyana × Balsamorhiza hookeri (WS, WSTC, WTU; 30; 1921-2013)
Balsamorhiza careyana × Balsamorhiza rosea (PNNL, PSM, WS, WTU; 18; 1934-2009)
Balsamorhiza careyana × Balsamorhiza sagittata (WS, WTU; 9; 1942-2017)
Balsamorhiza careyana × Balsamorhiza serrata (WS, WTU; 7; 1942-2011)
Balsamorhiza deltoidea (BOIS, EVE, HPSU, ID, OSC, PLU, PSM, UBC, WS, WTU; 78; 1878-2019)
Balsamorhiza deltoidea × Balsamorhiza hookeri (MONT, WS; 2; 1923-1944)
Balsamorhiza hirsuta var. lagocephala × Balsamorhiza sagittata (WTU; 2; 1935-1946)
Balsamorhiza hirsuta × Balsamorhiza sagittata (WS; 10; 1935-1940)
Balsamorhiza hookeri (EWU, HPSU, ID, MONT, NY, OSC, PLU, PSM, REED, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 226; 1880-2015)
Balsamorhiza hookeri × Balsamorhiza rosea (WS; 1; 1980)
Balsamorhiza hookeri × Balsamorhiza sagittata (WS, WTU, WWB; 18; 1901-2013)
Balsamorhiza incana (ID, OSC, SRP, UBC, WCW, WS, WTU; 37; 1897-2014)
Balsamorhiza rosea (ID, OSC, PLU, PNNL, PSM, RM, SRP, V, WS, WSTC, WTU, WWB; 68; 1902-2014)
Balsamorhiza sagittata (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, REED, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 361; 1889-2020)
Balsamorhiza sagittata × Balsamorhiza serrata (WS, WTU; 5; 1941-1949)
Balsamorhiza sericea (OSC; 1; 1935)
Balsamorhiza serrata (EWU, ID, IDS, OSC, PLU, PSM, RM, SRP, UBC, WCW, WS, WTU; 69; 1896-2013)
Balsamorhiza ×terebinthacea (OSC, WTU; 3; 1893-1933)
Bellis perennis (CIC, EWU, HPSU, NOCA, NY, OSC, PLU, PSM, RM, SRP, WCW, WS, WSTC, WTU, WWB; 90; 1904-2018)
Bidens amplissima (SRP, WTU, WWB; 11; 1932-2018)
Bidens beckii (OSC, PSM, WS, WTU; 13; 1891-2016)
Bidens cernua (EWU, HPSU, ID, NOCA, OSC, PLU, PSM, REED, RM, SRP, UBC, UWB, V, WCW, WS, WTU, WWB; 166; 1886-2018)
Bidens connata (ID, UBC, WS, WTU; 21; 1965-2018)
Bidens frondosa (HPSU, ID, IDE, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, UWB, WCW, WS, WSTC, WTU, WWB; 104; 1892-2018)
Bidens tripartita (PSM, UBC, V, WS, WTU; 21; 1880-2018)
Bidens vulgata (EWU, ID, IDE, OSC, PSM, V, WCW, WS, WTU, WWB; 43; 1892-2017)
Blepharipappus glandulosus (WCW, WTU; 3; 1892-1934)
Blepharipappus scaber (ID, OSC, PSM, RM, UBC, WCW, WS, WSTC, WTU; 61; 1884-2013)
Blepharopappus scaber (WS; 2; 1995)
Boltonia asteroides (WTU; 3; 2003-2008)
var. recognita (WTU; 1; 2008)
Borrichia frutescens (WS; 1; 2000)
Bradburia pilosa (EWU; 1; 1911)
Brickellia eupatorioides (WS; 1; 1897)
var. eupatorioides (WS; 1; 1897)
Brickellia grandiflora (BLMVL, OSC, PSM, WS, WTU; 31; 1896-2017)
Brickellia greenei (OSC; 1; 1881)
Brickellia microphylla (WS, WTU; 5; 1927-1948)
var. microphylla (WS, WTU; 5; 1927-1948)
Brickellia oblongifolia (MONT, OSC, WS, WTU; 38; 1879-2006)
var. oblongifolia (OSC, WS; 18; 1881-1936)
Cacaliopsis nardosmia (EWU, HPSU, ID, NOCA, OSC, PSM, REED, SRP, UBC, WS, WSTC, WTU, WWB; 130; 1879-2013)
Calendula officinalis (UBC, WS, WTU; 7; 1987-2007)
Callistephus chinensis (WS; 1; 1904)
Canadanthus modestus (CIC, EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PSM, REED, RM, UBC, WS, WTU, WWB; 184; 1838-2019)
Carduus acanthoides (RM, WTU; 4; 1977-2018)
Carduus edulis (PLU, WTU; 2; 1892)
Carduus nutans (IDE, PSM, UBC, WS, WTU, WWB; 12; 1908-2006)
Carduus pycnocephalus (WTU; 1; 2018)
Carduus tenuiflorus (ID, IDE, WS, WTU; 11; 1991-2009)
Carthamus tinctorius (IDE, WTU; 2; 1989-2000)
Centaurea benedicta (OSC, WS, WTU; 8; 1897-1991)
Centaurea calcitrapa (IDE, V, WS; 8; 1987-1990)
Centaurea cardunculus (WS; 2; 1988)
Centaurea cineraria (IDE; 2; 1988)
Centaurea cyanus (EWU, HPSU, NOCA, OSC, PLU, PSM, SRP, UBC, V, WCW, WS, WTU, WWB; 128; 1889-2019)
var. denudata (WTU; 1; 1920)
Centaurea dealbata (V, WS; 2; 1986-1991)
Centaurea debeauxii (UBC; 1; 1984)
Centaurea diffusa (ID, NOCA, NY, OSC, PLU, PNNL, PSM, RM, UBC, USFS, UWB, V, WCW, WS, WTU, WWB; 138; 1907-2019)
Centaurea ×gerstlaueri (HPSU, OSC, PLU, PSM, SRP, WS, WTU, WWB; 96; 1923-2020)
Centaurea gymnocarpa (V; 1; 1985)
Centaurea iberica (WS; 1; 1929)
Centaurea jacea (EWU, HPSU, PSM, RM, SRP, V, WS, WTU; 27; 1923-2016)
Centaurea jacea × Centaurea nigra (WS; 17; 1936-1997)
Centaurea macrocephala (SRP, UBC, V, WS, WTU; 9; 1918-2006)
Centaurea melitensis (MONT, SRP, UBC, V, WS, WTU, WWB; 17; 1881-2016)
Centaurea moncktonii × Centaurea nigra) (WS; 1; 2007)
Centaurea montana (NOCA, PSM, SRP, V, WS, WTU, WWB; 35; 1958-2018)
Centaurea nigra (IDE, PSM, RM, V, WS, WTU, WWB; 11; 1895-1987)
Centaurea nigrescens (NOCA, NY, PSM, SRP, V, WS, WSTC, WTU; 15; 1928-1996)
Centaurea ragusina (WS; 2; 1988)
Centaurea solstitialis (BLMVL, EWU, ID, IDE, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, RM, SRP, UBC, USFS, V, WCW, WS, WSTC, WTU, WWB; 112; 1898-2017)
Centaurea stoebe (CIC, EWU, HPSU, ID, IDE, NOCA, NY, OSC, PLU, PSM, RM, SRP, USFS, WCW, WS, WTU, WWB; 119; 1923-2019)
ssp. australis (CIC, EWU, HPSU, ID, IDE, NOCA, NY, OSC, PLU, RM, SRP, USFS, WCW, WS, WTU, WWB; 112; 1923-2019)
Centaurea sulphurea (SRP, V; 2; 1988-1989)
Centaurea trichocephala (IDE, SRP, UBC, V, WS, WTU; 19; 1983-1987)
Centaurea ×varnensis (OSC, WS, WTU; 25; 1950-2018)
Centaurea virgata (WS; 1; 2007)
ssp. squarrosa (WS; 1; 2007)
Centromadia pungens (EWU, ID, NOCA, OSC, UBC, WCW, WS, WTU; 34; 1898-2018)
ssp. pungens (ID, NOCA, OSC, WTU; 14; 1951-2018)
Chaenactis douglasii (EWU, HPSU, ID, IDS, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, REED, RM, SOC, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 376; 1881-2019)
var. douglasii (ID, NOCA, NY, OSC, PNNL, RM, SOC, SRP, WS, WSTC, WTU, WWB; 238; 1883-2019)
Chaenactis evermannii (WTU; 3; 1934-1950)
Chaenactis glabriuscula (WCW; 1; 1979)
Chaenactis imbricata (WS; 1; 1898)
Chaenactis macrantha (OSC; 1; 1896)
Chaenactis nevadensis (ID, PSM, WTU; 6; 1934-1951)
Chaenactis thompsonii (NY, OSC, WS, WTU; 19; 1931-2020)
Chondrilla juncea (EWU, ID, MONTU, OSC, WS, WTU, WWB; 39; 1938-2018)
Chrysanthemum cenerasiafolium (WTU; 1; 1927)
Chrysanthemum leucanthemum (WTU; 2; 1888-1897)
var. subpinnatilfidum (WTU; 2; 1888-1897)
Chrysothamnus humilis (WS; 1; 1954)
Chrysothamnus viscidiflorus (EWU, ID, MONT, OSC, PLU, PNNL, PSM, UBC, V, WCW, WS, WSTC, WTU, WWB; 177; 1877-2018)
ssp. axillaris (WTU; 1; 2008)
ssp. lanceolatus (ID, MONT, OSC, UBC, WS, WTU, WWB; 67; 1877-2018)
ssp. puberulus (ID, WS; 3; 1953-1954)
ssp. viscidiflorus (ID, OSC, PLU, PNNL, WCW, WS, WTU, WWB; 64; 1884-2018)
Cichorium intybus (EWU, ID, MONT, NOCA, OSC, PLU, PNNL, PSM, UWB, WCW, WS, WSTC, WTU, WWB; 96; 1892-2018)
Cirsium arvense (EWU, ID, IDE, MONT, NOCA, NY, OSC, PLU, PNNL, PSM, RM, UWB, WCW, WS, WTU, WWB; 180; 1892-2019)
Cirsium brevifolium (EWU, HPSU, PNNL, PSM, SRP, WS, WTU; 44; 1889-2013)
Cirsium brevistylum (NOCA, NY, OSC, PLU, PSM, WS, WTU, WWB; 34; 1889-2018)
Cirsium cymosum (WS, WTU; 2; 2008)
var. canovirens (WS, WTU; 2; 2008)
Cirsium edule (BLMMD, EWU, ID, IDE, MONT, NOCA, OSC, PLU, PSM, SRP, UBC, WCW, WS, WTU, WWB; 146; 1882-2019)
var. edule (ID, NOCA, OSC, WS, WTU; 43; 1885-2019)
var. wenatchense (OSC, WTU; 8; 1893-2006)
Cirsium flodmanii (WS; 1; 1997)
Cirsium foliosum (WS, WTU; 8; 1889-1934)
Cirsium hookerianum (ID, NOCA, WS, WSTC, WTU, WWB; 17; 1892-2010)
Cirsium inamoenum (OSC, WS; 2; 1982-1989)
var. inamoenum (WS; 1; 1982)
Cirsium mohavense (NY; 2; 1982-1983)
Cirsium neomexicanum (OSC; 1; 1985)
Cirsium remotifolium (HPSU, ID, MONT, OSC, UBC, WS, WTU; 33; 1883-2018)
Cirsium scariosum (WTU; 6; 1916-2018)
Cirsium undulatum (EWU, ID, NOCA, OSC, PNNL, PSM, RM, WS, WSTC, WTU, WWB; 116; 1882-2019)
Cirsium vulgare (EVE, EWU, ID, IDE, MONT, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, USFS, UWB, WCW, WS, WTU, WWB; 153; 1883-2019)
Coleosanthus oblongifolia (WTU; 2; 1929)
Columbiadoria hallii (OSC, PSM, WS, WTU; 16; 1880-1980)
Conyza bonariensis (SRP, WTU; 7; 1999-2017)
Conyza canadensis (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, USFS, UWB, WCW, WS, WSTC, WTU, WWB; 198; 1888-2018)
Conzya canadensis (LEA; 1; 1958)
Coreopsis grandiflora (WTU; 1; 2001)
Coreopsis grandiflora × Coreopsis lanceolata (WTU; 4; 1999-2018)
Coreopsis lanceolata (HPSU, WS, WTU; 3; 1973-2008)
Coreopsis tinctoria (CIC, ID, MONT, OSC, PNNL, PSM, RM, UBC, USFS, WS, WSTC, WTU, WWB; 94; 1872-2019)
Cosmos bipinnatus (WTU; 3; 2000-2001)
Cota austriaca (IDE, SRP, WS, WTU; 24; 1915-2004)
Cota tinctoria (EWU, NOCA, OSC, SRP, WS, WTU, WWB; 15; 1895-2004)
Cota triumfettii (WTU; 1; 2013)
Cotula coronopifolia (ID, MONT, OSC, PLU, PSM, RM, SRP, UBC, UWB, WCW, WS, WTU, WWB; 87; 1883-2020)
Crepis acuminata (EWU, ID, IDS, OSC, PSM, RM, UBC, WS, WSTC, WTU; 35; 1892-2014)
Crepis atribarba (EWU, ID, IDE, IDS, MONT, NOCA, OSC, PNNL, PSM, RM, SRP, UBC, WCW, WS, WSTC, WTU; 261; 1884-2019)
Crepis bakeri (ID, PLU, UBC, WS, WTU; 12; 1944-2013)
Crepis barbigera (ID, IDS, NOCA, NY, OSC, PLU, PNNL, SRP, UBC, WS, WSTC, WTU, WWB; 120; 1883-2014)
Crepis capillaris (EVE, EWU, HPSU, MONT, NOCA, OSC, PLU, PSM, RM, USFS, UWB, WS, WTU, WWB; 165; 1882-2018)
Crepis exilis (WTU; 1; 1928)
ssp. exilis (WTU; 1; 1928)
Crepis gracilis (WTU; 20; 1916-1940)
Crepis intermedia (EWU, HPSU, ID, NOCA, OSC, PSM, RM, UBC, WS, WTU; 87; 1881-2019)
Crepis modocensis (ID, MONT, OSC, PSM, RM, UBC, WCW, WS, WTU; 71; 1879-2015)
var. modocensis (OSC, RM; 5; 1986-2002)
Crepis monticola (WS; 1; 1888)
Crepis nicaeensis (HPSU, NOCA, PSM, WCW, WTU, WWB; 13; 1954-2010)
Crepis occidentalis (EWU, HPSU, ID, MONT, NOCA, OSC, PNNL, PSM, RM, SRP, UBC, V, WCW, WS, WSTC, WTU; 102; 1879-2015)
var. conjuncta (WTU; 1; 1949)
Crepis runcinata (ID, MONT, OSC, PLU, WS, WSTC, WTU; 21; 1884-1991)
ssp. runcinata (ID, MONT, WS; 4; 1884-1991)
Crepis setosa (UBC, WTU; 3; 2000-2016)
Crepis tectorum (WS, WTU; 2; 2003-2015)
Crocidium multicaule (CIC, EWU, HPSU, ID, IDS, MONT, OSC, PLU, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 169; 1882-2019)
Crocidium pugetense (WS; 1; 1897)
Crupina vulgaris (BLMMD, NOCA, OSC, WS, WTU; 11; 1989-2013)
Cyclachaena xanthiifolia (EWU, ID, IDE, NOCA, OSC, SRP, WCW, WS, WSTC, WTU, WWB; 46; 1878-2018)
Cynara cardunculus (IDE; 3; 1988)
Dieteria canescens (BOIS, HPSU, ID, IDE, NOCA, NY, OSC, PNNL, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 176; 1877-2018)
var. canescens (HPSU, ID, OSC, SRP, WS, WSTC, WTU; 11; 1877-2014)
var. incana (NY, OSC, WS, WTU; 93; 1881-2017)
var. shastensis (ID, OSC, SRP; 4; 2011)
Dimerosporium collinsii (WTU; 2; 1917-1919)
Doronicum pardalianches (SRP, WTU; 2; 1980-2014)
Eatonella nivea (ID, WS, WTU; 7; 1971-1995)
Echinops exaltatus (WS, WTU; 2; 1954-1999)
Echinops ritro (IDE; 8; 1988)
ssp. ruthenicus (IDE; 8; 1988)
Echinops sphaerocephalus (IDE, WS; 3; 1954-1995)
Eclipta prostrata (IDE; 1; 1990)
Elephantopus angustifolius (WSTC; 1; 1962)
Erechtites glomeratus (HPSU, WTU; 2; 1962-1969)
Erechtites hieraciifolius (WS, WTU; 2; 1941)
Erechtites minimus (HPSU, OSC, UBC, WS, WTU; 25; 1966-2020)
Ericameria bloomeri (EWU, HPSU, ID, IDS, MONT, OSC, PSM, WS, WSTC, WTU, WWB; 65; 1877-2018)
Ericameria crispa (NY; 1; 1981)
Ericameria discoidea (WS; 9; 1897-1996)
Ericameria greenei (EWU, HPSU, ID, MONT, NOCA, OSC, UBC, WTU; 26; 1897-2014)
Ericameria linearis (WTU; 1; 2017)
Ericameria nana (OSC; 2; 1925)
Ericameria nauseosa (CIC, COLO, EWU, ID, NOCA, NY, OSC, PLU, PNNL, PSM, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 256; 1884-2018)
var. nana (COLO, ID, NY, OSC, RM, WS, WTU; 23; 1928-2002)
var. nauseosa (EWU, RM, WS; 13; 1952-2014)
var. speciosa (CIC, EWU, ID, NOCA, OSC, PLU, PNNL, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 143; 1884-2018)
Ericameria parryi (WTU; 1; 2010)
Ericameria resinosa (ID, MONT, OSC, SRP, WS, WTU, WWB; 45; 1884-2019)
Ericameria suffruticosa (EWU, OSC; 2; 1897-1919)
Erigeron acris (ALA, HPSU, ID, NOCA, OSC, RM, UBC, WS, WTU, WWB; 63; 1881-2015)
var. kamtschaticus (ID, NOCA, OSC, RM, UBC, WS, WTU, WWB; 48; 1881-2015)
Erigeron aliceae (OSC, PSM, WS, WTU; 18; 1931-1994)
Erigeron annuus (ID, NOCA, OSC, PNNL, PSM, SRP, UBC, V, WS, WTU, WWB; 34; 1896-2018)
var. annuus (UBC, WTU; 2; 1903-1937)
Erigeron asperugineus (WCW; 1; 1974)
Erigeron aureus (CIC, EWU, ID, MONT, NOCA, OSC, PLU, PSM, REED, WCW, WS, WTU, WWB; 167; 1889-2019)
Erigeron basalticus (NY, WS, WTU; 11; 1942-1992)
Erigeron bellidiastrum (PLU; 1; 1947)
Erigeron bloomeri (EWU, ID, OSC, PSM, RM, UBC, WS, WTU; 35; 1892-2014)
var. bloomeri (EWU, OSC, RM, WS, WTU; 14; 1892-2006)
Erigeron brandegii (WTU; 1; 1888)
Erigeron caespitosus (OSC, WS; 4; 1898-1924)
Erigeron cascadensis (WWB; 1; 1978)
Erigeron chrysopsidis (CIC, ID, IDS, MONT, OSC, PLU, PSM, RM, WCW, WS, WTU; 29; 1893-2013)
var. austiniae (ID, IDS, MONT, OSC; 4; 1950)
var. chrysopsidis (CIC, WS, WTU; 6; 1896-2013)
Erigeron ciliolatus (NY, RM, WS; 3; 1895)
Erigeron compactus (WTU; 1; 1926)
Erigeron compositus (ALA, EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PSM, RM, SOC, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 332; 1880-2018)
ssp. compositus (WTU; 1; 1916)
ssp. posticus (WTU; 3; 1934-1935)
var. trifidus (OSC; 4; 1934)
Erigeron concinnus (EWU, ID, IDS, OSC, SRP, WS, WSTC, WTU; 20; 1904-1954)
var. concinnus (OSC, SRP, WS; 8; 1904-1949)
Erigeron corymbosus (CIC, EWU, ID, IDS, LEA, MONT, NOCA, OSC, PNNL, RM, SRP, UBC, WS, WTU, WWB; 197; 1884-2015)
Erigeron coulteri (WCW; 1; 1933)
Erigeron curvifolius (OSC, WS, WTU; 4; 1884-1935)
Erigeron davisii (ID, WS, WTU; 4; 1957-2011)
Erigeron decumbens (PSM, WWB; 4; 1948-1968)
Erigeron disparipilus (ID, IDS, MONT, OSC, RM, WS, WTU; 17; 1935-2019)
Erigeron divergens (EWU, ID, IDS, LEA, NOCA, OSC, PNNL, RM, UBC, WCW, WTU, WWB; 61; 1893-2016)
Erigeron eatonii (ID, OSC, RM, UBC, WS, WTU; 29; 1903-2017)
var. villosus (ID, OSC, RM, WS, WTU; 18; 1936-2005)
Erigeron elegantulus (WS; 1; 1995)
Erigeron elmeri (NY; 1; 1897)
Erigeron engelmannii (ID; 1; 1978)
Erigeron filifolius (BLMMD, EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PNNL, PSM, REED, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 315; 1884-2019)
Erigeron filiformis (WTU; 1; 1936)
Erigeron flettii (WS, WTU; 15; 1898-2016)
Erigeron foliosus (PNNL, WTU; 2; 1983-1992)
var. confinis (PNNL, WTU; 2; 1983-1992)
Erigeron glabellus (WTU; 2; 1924-1956)
var. pubescens (WTU; 1; 1956)
Erigeron glacialis (CIC, HPSU, ID, MONT, NOCA, OSC, PLU, RM, SOC, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 354; 1879-2012)
var. glacialis (CIC, HPSU, ID, MONT, NOCA, OSC, PLU, RM, SOC, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 353; 1879-2012)
Erigeron glaucus (WCW; 3; 1967-1969)
Erigeron gracilis (PLU, WCW; 2; 1909-1987)
Erigeron grandiflorus (WCW; 1; 1965)
Erigeron hispidissimus (WTU; 1; 1902)
Erigeron howellii (WS, WTU; 5; 1979-1980)
Erigeron humilis (WS; 1; 1969)
Erigeron inornatus (HPSU, OSC, WTU; 12; 1882-2003)
var. inornatus (WTU; 2; 1906)
Erigeron karvinskianus (WTU; 5; 2001-2016)
Erigeron lanatus (WTU; 1; 1924)
Erigeron lanceolatus (WWB; 1; 1935)
Erigeron leibergi (SRP; 1; 1930)
Erigeron leibergii (NOCA, NY, OSC, PSM, WTU, WWB; 44; 1893-2013)
Erigeron linearis (EWU, HPSU, ID, IDS, LEA, MONT, MONTU, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 408; 1884-2020)
Erigeron lonchophyllus (PSM, WS, WTU; 12; 1923-2015)
Erigeron nauseosus (WTU; 1; 1888)
Erigeron nivalis (ID, NOCA, OSC, REED, RM, WS, WTU, WWB; 99; 1880-2014)
Erigeron oreganus (HPSU, ID, OSC, UBC, WS, WTU; 16; 1877-1990)
Erigeron peregrinus (EWU, HPSU, ID, IDS, LEA, MONT, NOCA, OSC, PLU, PSM, SRP, WCW, WS, WTU, WWB; 119; 1893-2017)
f. membranaceus (WS; 1; 1922)
var. peregrinus (NOCA, OSC, WWB; 13; 1965-2002)
var. thompsonii (OSC, WS, WTU; 15; 1902-2015)
Erigeron philadelphicus (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, RM, SRP, WCW, WS, WTU, WWB; 179; 1878-2019)
var. philadelphicus (WTU; 1; 2004)
Erigeron piperianus (HPSU, ID, MONT, NY, OSC, PLU, PNNL, PSM, RM, WS, WSTC, WTU, WWB; 65; 1893-2008)
Erigeron piperianus × Erigeron poliospermus (WTU; 1; 2014)
Erigeron poliospermus (CIC, EWU, ID, IDS, MONT, NY, OSC, PLU, PNNL, PSM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 275; 1882-2019)
var. cereus (ID, NY, WS, WTU; 32; 1889-2008)
var. poliospermus (ID, OSC, PNNL, SRP, UBC, WCW, WS, WTU; 124; 1882-2014)
Erigeron pumilis (WS; 2; 1998)
Erigeron pumilus (CIC, EWU, ID, IDS, LEA, NOCA, OSC, PLU, PNNL, PSM, RM, UBC, WCW, WS, WSTC, WTU, WWB; 257; 1882-2019)
var. intermedius (EWU, ID, NOCA, OSC, PNNL, RM, UBC, WS, WTU, WWB; 193; 1882-2019)
var. pumilus (ID, WTU, WWB; 9; 1972-2014)
Erigeron salishii (NY, V, WS, WTU; 16; 1921-2008)
Erigeron salsuginosus (IDS, PLU, PSM, REED, UBC, WS, WTU; 63; 1888-1972)
var. angustifolius (WTU; 3; 1906-1930)
Erigeron scaposus (WTU; 1; 1926)
Erigeron spathulifolius (OSC; 2; 1931-1941)
Erigeron speciosus (EVE, EWU, ID, IDS, LEA, MONT, NOCA, OSC, PLU, PSM, REED, RM, SRP, UBC, WS, WTU, WWB; 233; 1880-2017)
Erigeron strigosus (BLMMD, ID, NOCA, OSC, PSM, RM, SRP, WCW, WS, WTU, WWB; 72; 1888-2017)
var. septentrionalis (WS, WTU; 10; 1894-2012)
var. strigosus (NOCA, RM, WS, WTU, WWB; 24; 1888-2017)
Erigeron subtrinervis (ID, OSC, PSM, RM, WS, WTU, WWB; 59; 1896-2015)
Erigeron suksdorfii (WS; 1; 1885)
Erigeron uniflorus (OSC, PSM; 3; 1891-1905)
Erigeron yakimensis (RM; 1; 1923)
Eriophyllum caespitosum (WTU; 3; 1896-1970)
Eriophyllum gracile (WTU; 2; 1901-1927)
Eriophyllum lanatum (BBLM, EVE, EWU, ID, IDS, LINF, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, V, WCW, WS, WSTC, WTU, WWB; 638; 1881-2019)
var. achillioides (OSC, WS, WTU; 7; 1919-2006)
var. integrifolium (BBLM, EWU, ID, IDS, MONT, NOCA, OSC, PNNL, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 194; 1882-2019)
var. lanatum (ID, NOCA, OSC, PLU, PNNL, RM, SRP, UBC, WCW, WS, WTU, WWB; 109; 1881-2017)
var. lanceolatum (OSC; 2; 2001)
var. leucophyllum (MONT, OSC, SRP, WTU; 21; 1898-2019)
Eriophyllum multiflorum (WTU; 8; 1923-1937)
Eriophyllum superbum (NY; 1; 1902)
Eucephalus elegans (ID; 1; 1955)
Eucephalus engelmannii (CIC, EWU, IDS, NOCA, OSC, RM, WCW, WS, WTU, WWB; 107; 1889-2019)
Eucephalus glaucescens (NY, OSC, WS, WTU; 41; 1880-2005)
Eucephalus gormanii (WSTC; 1; 1947)
Eucephalus ledophyllus (ID, MONT, NOCA, OSC, PLU, PSM, SRP, UBC, WS, WTU, WWB; 105; 1882-2008)
var. covillei (WTU; 7; 1888-2005)
var. ledophyllus (ID, NOCA, WS, WTU; 27; 1890-2005)
Eucephalus paucicapitatus (EWU, ID, MONT, NY, OSC, PLU, UBC, V, WCW, WS, WTU, WWB; 66; 1890-2006)
Eurybia conspicua (EWU, ID, IDS, LEA, MONT, NOCA, OSC, RM, WS, WTU, WWB; 88; 1889-2004)
Eurybia divaricata (WTU; 1; 1958)
Eurybia integrifolia (HPSU, ID, RM, WCW, WS, WTU, WWB; 18; 1897-2002)
Eurybia merita (OSC, RM, WTU; 8; 1882-2016)
Eurybia radulina (HPSU, OSC, RM, WS, WSTC, WTU, WWB; 43; 1880-2003)
Eurybia sibirica (WS, WTU, WWB; 5; 1934-2015)
Euthamia graminifolia (ID, PNNL; 5; 1974-1992)
Euthamia occidentalis (ID, NOCA, NY, OSC, PNNL, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 91; 1889-2019)
Eutrochium maculatum (WTU; 2; 1937-1943)
Filago arvensis (CIC, EWU, ID, NOCA, OSC, PLU, PSM, RM, WS, WTU, WWB; 77; 1946-2020)
Filago vulgaris (OSC, WTU; 2; 2014)
Franseria bipinnatifida (ID, WTU; 11; 1889-1936)
var. insulaus (WTU; 1; 1931)
Franseria chamissonis (WTU; 1; 1950)
var. pinnatisecta (WTU; 1; 1950)
Franseria villosa (WTU; 4; 1890-1937)
Gaertneria bipinnatifida (WTU; 2; 1892)
Gaertneria chamissonis (WTU; 1; 1892)
Gaillardia aristata (BLMMD, BOIS, CIC, EWU, HPSU, ID, IDS, LEA, MONT, NOCA, OSC, PLU, PNNL, PSM, REED, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 332; 1879-2019)
Gaillardia aristata × Gaillardia pulchella (WS; 3; 1947-1993)
Gaillardia ×grandflora (WTU; 1; 2007)
Gaillardia pinnatifida (WTU; 1; 2013)
Gaillardia suavis (WS; 1; 1941)
Galinsoga parviflora (WS, WTU; 6; 1911-1925)
var. parviflora (WS; 1; 1911)
Galinsoga quadriradiata (WCW, WS, WTU; 12; 1911-2015)
Gamochaeta purpurea (HPSU, NOCA, OSC, PLU, SRP, WTU, WWB; 48; 1888-2007)
Gamochaeta ustulata (NY, OSC, WS, WTU; 45; 1890-2018)
Glebionis coronaria (WS; 1; 1892)
Gnaphalium palustre (EVE, EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 234; 1879-2019)
Gnaphalium uliginosum (ID, NOCA, OSC, PLU, PSM, SRP, UAAH, WS, WTU, WWB; 112; 1885-2019)
Grindelia hirsutula (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PNNL, PSM, RM, UBC, V, WCW, WS, WSTC, WTU, WWB; 378; 1881-2019)
Grindelia integrifolia (HPSU, ID, MONT, OSC, PLU, PSM, UWB, V, WCW, WS, WTU, WWB; 62; 1905-2020)
Grindelia oregana (MONT, NY, WWB; 3; 1931-1940)
ssp. wilkesiana (NY; 1; ?)
Grindelia squarrosa (EWU, PSM, V, WCW, WS, WTU; 35; 1895-2017)
Grindelia stricta (RM, WTU; 2; 1892-1928)
var. aestuarina (RM; 1; 1928)
var. lanata (WTU; 1; 1892)
Guizotia abyssinica (WS, WTU; 2; 2005)
Gutierrezia sarothrae (PSM, WS, WTU; 13; 1908-2013)
Haplopappus columbianus (NY; 1; 1893)
Haplopappus gummifer (WS; 1; 1906)
Haplopappus lanuginosus (WTU; 1; 1944)
ssp. lanuginosus (WTU; 1; 1944)
Harpaecarpus longipes (WS; 1; 1906)
Helenium autumnale (HPSU, ID, OSC, PNNL, PSM, REED, WS, WSTC, WTU; 69; 1883-2019)
Helenium puberulum (WS; 2; 1925-1944)
Helianthella annuus (WS; 1; 1992)
Helianthella douglasii (EWU, REED, WTU; 5; 1895-1948)
Helianthella uniflora (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PSM, RM, SRP, UBC, WS, WTU, WWB; 130; 1881-2020)
var. douglasii (HPSU, ID, IDS, MONT, NOCA, OSC, SRP, UBC, WS, WTU, WWB; 63; 1881-2020)
Helianthus annuus (EWU, ID, IDE, OSC, PNNL, PSM, UBC, WCW, WS, WSTC, WTU, WWB; 120; 1889-2018)
Helianthus ciliaris (IDE, WS; 11; 1973-1989)
Helianthus cusickii (EWU, ID, IDS, OSC, PNNL, PSM, UBC, WS, WSTC, WTU; 69; 1882-2016)
Helianthus grosseserratus (WS, WTU; 4; 1916-1928)
Helianthus hirsutus (WS; 2; 1889-1890)
Helianthus maximiliani (WS; 3; 1919-1929)
Helianthus nuttallii (ID, WS, WSTC, WTU; 7; 1882-1950)
ssp. nuttallii (WS; 3; 1950)
Helianthus petiolaris (MONT, PLU, WS, WTU; 6; 1918-2008)
ssp. petiolaris (WS, WTU; 3; 1918-2008)
Helianthus tuberosus (OSC, PSM, SRP, WS, WTU; 6; 1897-1950)
Hemizonella durandi (WTU; 1; 1933)
Hemizonella minima (HPSU, ID, NOCA, OSC, PLU, PSM, RM, UBC, WS, WTU, WWB; 84; 1878-2013)
Heterotheca hirsuta (ID; 3; 1995-2001)
Heterotheca hispida (ID; 1; 1984)
Heterotheca oregona (OSC, SRP, WTU, WWB; 25; 1888-2018)
var. oregona (OSC, WTU; 12; 1890-2015)
Heterotheca sessiliflora (WS, WTU; 3; 1921-1997)
ssp. bolanderi (WS; 2; 1921-1997)
Heterotheca vespertina (ID; 2; 1958-1992)
Heterotheca villosa (CIC, EWU, HPSU, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 144; 1880-2017)
var. foliosa (OSC, WS, WTU; 16; 1892-1983)
var. minor (EWU, HPSU, NOCA, OSC, PLU, UBC, WCW, WS, WTU, WWB; 52; 1880-2010)
var. villosa (NOCA, OSC, PNNL, RM, SRP, UBC, WS, WTU; 51; 1886-2017)
Hieracium albiflorum (CIC, EVE, EWU, ID, LINF, MONT, MORA, NOCA, NY, OSC, PLU, PSM, RM, UBC, WCW, WS, WSTC, WTU, WWB; 316; 1880-2020)
Hieracium albiflorum × Hieracium longiberbe (WTU; 1; 1923)
Hieracium ambiguum (WS; 17; 1889-1933)
Hieracium aurantiacum (EWU, ID, NOCA, OSC, PSM, UWB, WS, WTU, WWB; 52; 1965-2018)
Hieracium aurantiacum × Hieracium pilosella (WWB; 1; 1977)
Hieracium caespitosum (EWU, ID, IDE, NOCA, OSC, PSM, RM, SRP, WS, WTU, WWB; 67; 1969-2018)
Hieracium cascadorum (NY; 1; 1902)
Hieracium chelannense (NY; 1; 1897)
Hieracium cusickianum (NY; 2; 1902)
Hieracium diaphanum (SRP, WS; 2; 2002)
Hieracium flagellare (UBC, WS, WTU; 4; 2003-2017)
Hieracium ×floribundum (WS, WTU; 12; 1992-2012)
Hieracium glomeratum (IDE, WTU; 15; 1969-2014)
Hieracium gracile × Hieracium scouleri (WTU; 1; 1932)
Hieracium griseum (REED; 1; 1916)
Hieracium horridum (WWB; 1; 1962)
Hieracium lachenalii (HPSU, ID, IDE, NOCA, OSC, PLU, WS, WTU; 59; 1962-2019)
Hieracium laevigatum (ID, IDE; 14; 1996-2004)
Hieracium longiberbe (OSC, PSM, WS, WTU; 8; 1919-1985)
Hieracium maculatum (WTU; 1; 1999)
Hieracium murorum (WTU; 7; 1999-2014)
Hieracium paddoense (NY; 1; 1893)
Hieracium pilosella (WTU; 10; 2005-2019)
Hieracium piloselloides (OSC, WTU; 2; 2013)
Hieracium piperi (WS; 1; 1904)
Hieracium sabaudum (ID, IDE, OSC, WTU; 26; 1964-2018)
Hieracium scabriusculum (WS; 1; 1902)
f. phaeostylum (WS; 1; 1902)
Hieracium scouleri (BLMMD, CIC, EWU, HPSU, ID, IDE, NOCA, NY, OSC, PLU, PSM, REED, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 422; 1880-2020)
var. cynoglossoides (WTU; 7; 1901-1962)
Hieracium ×stoloniflorum (WTU; 4; 1970-2004)
Hieracium suksdorfii (NY, WS; 2; 1906)
Hieracium triste (EWU, ID, IDS, LEA, MONT, MORA, NOCA, OSC, PLU, PSM, RM, UBC, V, WS, WSTC, WTU, WWB; 234; 1880-2014)
Hieracium umbellatum (EWU, ID, NOCA, OSC, PSM, RM, UBC, WCW, WS, WTU, WWB; 85; 1883-2014)
Hoorebekia lanuginosa (EWU; 1; 1919)
Hulsea nana (ID, OSC, UBC, WS, WTU; 50; 1880-2016)
Hymenopappus columbianus (RM, WS; 2; 1893)
Hymenopappus filifolius (CIC, EWU, ID, MONT, OSC, PNNL, PSM, SRP, UBC, WS, WSTC, WTU; 72; 1884-2015)
var. filifolius (CIC, ID, OSC, PNNL, SRP, WS, WTU; 38; 1884-2015)
var. lugens (WS; 1; ?)
var. parvulus (WS; 1; 1952)
Hymenopappus scabiosaeus (WS; 1; 1952)
var. corymbosus (WS; 1; 1952)
Hymenoxys richardsonii (WSTC; 1; 1951)
Hypochaeris glabra (HPSU, OSC, PSM, UBC, WS, WTU; 40; 1914-2019)
Hypochaeris radicata (EVE, EWU, HPSU, ID, IDE, IDS, LINF, NOCA, OSC, PLU, PSM, RM, UAAH, UBC, USFS, UWB, WCW, WS, WTU, WWB; 212; 1888-2019)
Inula helenium (WTU; 2; 1999)
Ionactis stenomeres (RM, WS, WTU, WWB; 23; 1902-2012)
Iva axillaris (EWU, ID, MONT, OSC, PNNL, PSM, UBC, WS, WSTC, WTU, WWB; 64; 1884-2019)
Jacobaea maritima (WTU; 2; 2003-2008)
Jacobaea vulgaris (BBLM, EVE, HPSU, IDE, NOCA, OSC, PLU, PSM, UAAH, UBC, WCW, WS, WTU, WWB; 78; 1949-2020)
Jaumea carnosa (ID, OSC, PLU, PSM, SRP, UBC, WCW, WS, WTU, WWB; 58; 1886-2019)
Lactuca biennis (MONT, NOCA, OSC, PSM, RM, WCW, WS, WTU, WWB; 65; 1880-2014)
Lactuca canadensis (EWU, OSC, WS, WTU; 15; 1889-2017)
Lactuca ludoviciana (PSM, WS, WTU; 14; 1889-1974)
Lactuca saligna (ID, WS, WTU; 3; 1971-2011)
Lactuca sativa (ID, OSC, PLU, PSM, RM, UBC, WS, WTU; 19; 1890-1974)
Lactuca sativa × Lactuca serriola (WS; 1; 1945)
Lactuca serriola (EWU, ID, LEA, NOCA, OSC, PLU, PNNL, PSM, RM, USFS, UWB, WCW, WS, WSTC, WTU, WWB; 141; 1889-2018)
Lactuca spicata (WWB; 1; 1914)
Lactuca tatarica (EWU, ID, MONT, NOCA, OSC, PSM, WCW, WS, WSTC, WTU, WWB; 84; 1880-2019)
ssp. pulchella (EWU, ID, MONT, NOCA, OSC, WCW, WS, WSTC, WTU, WWB; 83; 1880-2019)
Lactuca virosa (ID, SRP, WTU; 14; 2014-2017)
Lagophylla ramosissima (EWU, ID, IDS, OSC, PNNL, SRP, UBC, WS, WSTC, WTU; 111; 1880-2019)
Lapsana communis (HPSU, ID, LINF, MONT, NOCA, OSC, PLU, PSM, RM, SRP, UAAH, WCW, WS, WTU, WWB; 103; 1883-2019)
Lapsona communis (WS; 1; 2005)
Lasthenia glaberrima (WS, WTU; 5; 1925-2019)
Lasthenia maritima (WTU; 4; 1933-2011)
Lasthenia minor (WS, WTU; 3; 1933-1990)
Layia douglasii (WTU; 1; 1901)
Layia glandulosa (ID, IDS, OSC, PNNL, SRP, UBC, WCW, WS, WTU, WWB; 84; 1893-2017)
var. glandulosa (ID, OSC, WTU; 5; 1898-1998)
Leontodon autumnalis (IDE, NOCA, PLU, PSM, USFS, WS, WTU, WWB; 29; 1951-2009)
Leontodon saxatilis (NOCA, PLU, WCW, WS, WTU, WWB; 37; 1923-2018)
ssp. saxatilis (NOCA, PLU, WCW, WS, WTU, WWB; 29; 1923-2018)
Leucanthemum ×superbum (ID, WTU; 3; 2001-2017)
Leucanthemum vulgare (EWU, ID, IDE, MONT, NOCA, OSC, PLU, PSM, RM, SRP, USFS, UWB, V, WCW, WS, WSTC, WTU, WWB; 191; 1892-2019)
Logfia gallica (WTU; 1; 2013)
Logfia minima (EVE, ID, OSC, WS, WTU; 33; 1993-2018)
Luina hypoleuca (EWU, HPSU, ID, IDS, MORA, NOCA, OSC, PLU, PSM, SRP, UBC, WCW, WS, WTU, WWB; 203; 1888-2019)
Luina serpentina (WTU, WWB; 2; 1979-2011)
Lygodesmia juncea (WS, WTU; 2; 1912-1974)
Madia citrigracilis (WS, WTU; 5; 1901-1958)
Madia citriodora (ID, NY, OSC, RM, WCW, WS, WTU, WWB; 28; 1878-2011)
Madia elegans (ID, RM, WS, WTU; 7; 1908-2018)
Madia exigua (EWU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 172; 1881-2019)
Madia filipes (WS, WTU; 8; 1892-1902)
var. macrocephala (WS; 1; 1892)
Madia glomerata (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PSM, RM, UBC, WCW, WS, WTU, WWB; 148; 1880-2018)
Madia gracilis (BLMMD, EWU, ID, IDE, LEA, MONT, NOCA, OSC, PLU, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 256; 1880-2018)
Madia gracilis × Madia sativa (WTU; 3; 1888-1931)
Madia racemosa (IDS, REED; 2; 1904-1917)
Madia sativa (ID, NOCA, OSC, PSM, SRP, WS, WTU, WWB; 57; 1890-2019)
Malacothrix torreyi (PSM; 1; 1975)
Matricaria chamomilla (WS, WTU, WWB; 5; 1889-2004)
Matricaria discoidea (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PSM, REED, RM, SRP, USFS, UWB, WCW, WS, WTU, WWB; 180; 1883-2019)
Mauranthemum paludosum (WTU; 1; 1992)
Micropus californicus (WS; 1; 1915)
var. californicus (WS; 1; 1915)
Microseris bigelovii (WS, WTU; 2; 1923)
Microseris borealis (OSC, WS, WTU; 14; 1889-2006)
Microseris laciniata (EVE, EWU, OSC, PLU, PSM, WS, WTU; 60; 1882-2016)
ssp. laciniata (OSC; 2; 1940-1969)
ssp. leptosepala (OSC, WS; 24; 1882-1939)
Microseris nutans (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PSM, RM, SRP, WCW, WS, WTU, WWB; 319; 1879-2020)
Mycelis muralis (HPSU, ID, NOCA, OSC, PLU, PSM, UBC, WS, WTU, WWB; 93; 1923-2019)
Nabalus alatus (NOCA, PLU, PSM, SRP, WCW, WS, WTU, WWB; 54; 1890-2019)
Nabalus hastatus (OSC; 5; 1901-1979)
Nabalus sagittatus (MONT; 1; 1926)
Nestotus stenophyllus (EWU, ID, IDS, MONT, NY, OSC, PLU, PNNL, PSM, UBC, V, WS, WSTC, WTU, WWB; 120; 1882-2015)
Nothocalais alpestris (EWU, HPSU, ID, MONT, NOCA, OSC, PLU, PSM, UBC, WS, WSTC, WTU, WWB; 91; 1879-2015)
Nothocalais cuspidata (MONT, PLU; 2; 1953-1959)
Nothocalais troximoides (EWU, HPSU, ID, IDS, MONT, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, WCW, WS, WSTC, WTU, WWB; 237; 1880-2016)
Onopordum acanthium (BBLM, ID, IDE, WS, WTU; 25; 1952-2020)
ssp. acanthium (ID; 1; 2020)
Oreostemma alpigenum (HPSU, ID, IDS, LEA, MORA, OSC, PLU, PSM, UBC, V, WCW, WS, WSTC, WTU, WWB; 104; 1880-2019)
var. alpigenum (HPSU, ID, IDS, MORA, OSC, UBC, WCW, WS, WTU; 73; 1880-2019)
var. andersonii (WS; 1; 1973)
Packera bolanderi (HPSU, OSC, WS, WTU; 16; 1887-2014)
var. bolanderi (HPSU; 1; 1911)
var. harfordii (HPSU, OSC, WS, WTU; 13; 1887-1972)
Packera cana (BLMVL, EWU, ID, MONT, NOCA, OSC, PSM, RM, UBC, VALE, WCW, WS, WTU, WWB; 133; 1883-2014)
Packera contermina (WS, WTU; 17; 1892-1997)
Packera cymbalaria (NOCA, WTU; 3; 1969-2003)
Packera flettii (EWU, HPSU, ID, OSC, PLU, PSM, WCW, WS, WTU; 58; 1890-2017)
Packera indecora (EWU, NOCA, OSC, RM, WS, WTU, WWB; 46; 1892-2020)
Packera macounii (ID, NY, OSC, PSM, WS, WTU, WWB; 42; 1880-2018)
Packera multilobata (WS; 5; 1931-1979)
Packera pauciflora (ID, IDS, NOCA, OSC, RM, SRP, WTU, WWB; 20; 1908-2008)
Packera paupercula (EWU, ID, NOCA, OSC, WS, WTU; 49; 1877-2013)
Packera pseudaurea (EWU, ID, MONT, NOCA, OSC, PSM, RM, WCW, WS, WTU, WWB; 65; 1882-2012)
var. pseudaurea (MONT, NOCA, OSC, RM, WS, WTU; 48; 1882-2012)
Packera streptanthifolia (EWU, ID, IDS, NOCA, NY, OSC, PLU, PSM, REED, UBC, V, WCW, WTU; 107; 1882-2019)
Packera subnuda (ID, MONT, NOCA, OSC, UBC, V, WCW, WS, WTU; 53; 1892-2015)
var. subnuda (MONT, NOCA, OSC, WTU; 23; 1892-2011)
Parthenium argentatum × Parthenium fruticosum (WS; 3; 1984)
Parthenium argentatum × Parthenium tomentosum (WS; 2; 1984)
Petasites frigidus (CIC, EWU, HPSU, ID, MONT, NOCA, NY, OSC, PLU, PSM, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 315; 1883-2019)
var. frigidus (CIC, ID, NOCA, OSC, WCW, WS, WTU, WWB; 73; 1889-2012)
var. palmatus (CIC, EWU, HPSU, ID, NOCA, NY, OSC, PLU, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 155; 1883-2019)
Petasites frigidus var. palmatus × Petasites sagittatus (WS; 3; 1926-1927)
var. sagittatus (EWU, ID, MONT, RM, WS, WTU; 39; 1889-2012)
var. ×vitifolius (NY, UBC, WS, WTU; 7; 1927-2004)
Petasites hybridus (WS; 1; 1953)
Petasites japonicus (NOCA, OSC, SRP, WS, WTU; 20; 1975-2019)
Picris hieracioides (IDE, WS, WTU; 20; 1984-2018)
Plectocephalus americanus (V; 1; 1988)
Pleiacanthus spinosus (IDE, NOCA, WTU; 3; 1988-2009)
Prenanthes stricta (NY; 1; 1889)
Pseudognaphalium californicum (HPSU, PLU, WS, WTU; 5; 1893-1998)
Pseudognaphalium canescens (PSM, WS; 2; 1961-1972)
Pseudognaphalium luteoalbum (ID, OSC, PLU, UBC, WS, WTU; 22; 1902-2019)
Pseudognaphalium macounii (OSC, RM, WS, WTU; 15; 1881-2005)
Pseudognaphalium microcephalum (ID, MONT, NOCA, PLU, PNNL, UBC, WCW, WTU, WWB; 40; 1888-2016)
Pseudognaphalium stramineum (HPSU, ID, IDE, NOCA, OSC, PLU, PNNL, PSM, SRP, UBC, WCW, WS, WTU, WWB; 98; 1879-2019)
Pseudognaphalium thermale (BLMMD, ID, NOCA, OSC, PLU, SRP, WS, WTU, WWB; 68; 1881-2019)
Pseudognaphalium viscosum (NOCA, OSC, WTU, WWB; 7; 1884-2013)
Psilocarphus brevissimus (WS, WTU; 6; 1899-2014)
var. brevissimus (WS, WTU; 6; 1899-2014)
Psilocarphus elatior (ID, OSC, WS, WTU, WWB; 42; 1882-2018)
Psilocarphus oregonus (OSC, WS, WTU; 21; 1880-2013)
Psilocarphus tenellus (V, WS, WTU, WWB; 10; 1890-2018)
Ptilocalis nutans (WTU; 1; 1936)
Ptilonella scabra (EWU, WTU; 2; 1892-1907)
Ptiloria paniculata (WTU; 1; 1892)
Pyrrhopappus carolinianus (ID; 1; 2001)
Pyrrocoma balsamitae (NY; 1; 1902)
Pyrrocoma carthamoides (EWU, ID, IDS, NOCA, OSC, PSM, RM, UBC, WS, WTU; 81; 1880-2018)
var. carthamoides (ID, IDS, NOCA, OSC, WS, WTU; 46; 1880-2018)
var. cusickii (ID, RM, WS, WTU; 23; 1886-2018)
Pyrrocoma hirta (ID, RM, WS, WTU; 15; 1889-2010)
var. hirta (ID, RM; 2; 2002)
var. sonchifolia (ID, WS, WTU; 12; 1889-2010)
Pyrrocoma liatriformis (BLMVL, ID, NY, RM, SRP, VALE, WS, WTU; 27; 1884-2004)
Pyrrocoma racemosa (PSM, WCW; 2; 1894-1933)
Pyrrocoma rigida (RM; 1; 1897)
Pyrrocoma scaberula (WTU; 1; 2018)
Pyrrocoma suksdorfii (NY, WS; 2; 1889)
Pyrrocoma uniflora (OSC, WTU; 2; 1880-1994)
Rainiera stricta (ID, OSC, PLU, PSM, UBC, WS, WTU; 65; 1889-2015)
Rhaponticum repens (BBLM, EWU, ID, IDE, NOCA, NY, PNNL, PSM, REED, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 93; 1922-2018)
Rigiopappus leptocladus (ID, OSC, UBC, WS, WTU; 25; 1879-2018)
Rudbeckia alpicola (NOCA, OSC, WTU, WWB; 17; 1901-1990)
Rudbeckia hirta (NOCA, RM, UBC, WCW, WS, WTU; 16; 1892-2007)
var. pulcherrima (NOCA, RM, WS; 7; 1896-1995)
Rudbeckia laciniata (NOCA, WTU; 5; 1976-2001)
var. ampla (WTU; 2; 2001)
Rudbeckia occidentalis (EWU, HPSU, ID, NOCA, OSC, PSM, RM, WCW, WS, WTU, WWB; 50; 1884-2018)
Santolina chamaecyparissus (IDE; 7; 1991)
Saussurea americana (EWU, HPSU, ID, IDS, NOCA, OSC, PLU, PSM, UBC, WCW, WS, WTU, WWB; 92; 1880-2016)
Scorzonella leptosephala (WTU; 1; ?)
Senecio ×albescens (WS, WTU; 10; 1974-2013)
Senecio condensatus (ID, WS; 3; 1896-1936)
Senecio crassulus (ID, OSC, PNNL, RM, WCW, WS; 13; 1927-2002)
Senecio elmeri (NOCA, NY, OSC, V, WS, WTU, WWB; 64; 1897-2013)
Senecio eremophilus (PSM; 2; 1952)
Senecio fraternus (RM; 1; 1893)
Senecio fremontii (NOCA, OSC, UBC, WCW, WS, WTU, WWB; 67; 1890-2015)
var. blitoides (WTU; 1; 1955)
var. fremontii (NOCA, WS, WTU; 22; 1919-2015)
var. occidentalis (WS; 5; 1895-1897)
Senecio hydrophiloides (EWU, ID, MONT, OSC, PLU, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 95; 1880-2017)
Senecio hydrophilus (EWU, ID, OSC, PSM, WCW, WS, WTU; 38; 1880-2017)
Senecio integerrimus (EWU, HPSU, ID, IDS, MONT, NOCA, NY, OSC, PLU, PSM, REED, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 671; 1878-2019)
var. exaltatus (EWU, HPSU, ID, IDS, MONT, NOCA, NY, OSC, REED, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 423; 1882-2019)
var. integerrimus (ID, OSC, WTU, WWB; 6; 1936-2013)
var. ochroleucus (HPSU, ID, NOCA, OSC, REED, RM, SRP, UBC, WCW, WS, WTU, WWB; 116; 1878-2019)
Senecio lugens (EWU, RM, WCW, WS, WTU, WWB; 21; 1898-2004)
Senecio neowebsteri (EWU, ID, OSC, WCW, WS, WTU, WWB; 41; 1909-1978)
Senecio pauperculus (WTU; 1; 1931)
var. pauperculus (WTU; 1; 1931)
Senecio salishii (V; 1; 1993)
Senecio serra (BLMMD, EWU, ID, IDS, NOCA, OSC, PSM, RM, WCW, WS, WTU, WWB; 107; 1882-2017)
var. serra (ID, NOCA, RM, WS, WTU; 51; 1882-2017)
Senecio sphaerocephalus (HPSU, WCW; 2; 1972-2007)
Senecio sylvaticus (EVE, ID, NOCA, PLU, PSM, WCW, WS, WTU, WWB; 89; 1903-2019)
Senecio triangularis (EWU, HPSU, ID, LEA, MONT, MORA, NOCA, NY, OSC, PLU, PSM, RM, SOC, SRP, UBC, WCW, WS, WTU, WWB; 290; 1879-2020)
var. triangularis (MORA, NOCA, OSC, WS, WTU, WWB; 21; 1970-2005)
var. trichophyllus (WS; 1; 1928)
Senecio viscosus (OSC, SRP, V, WTU; 9; 2009-2019)
Senecio vulgaris (EWU, ID, MONT, NOCA, OSC, PLU, PSM, SRP, WCW, WS, WSTC, WTU, WWB; 147; 1885-2019)
Sericocarpus oregonensis (OSC, WS, WTU; 6; 1908-1920)
ssp. oregonensis (OSC, WS, WTU; 5; 1908-1920)
Sericocarpus rigidus (EVE, EWU, ID, OSC, V, WS, WTU, WWB; 29; 1888-2007)
Silybum marianum (EWU, WS, WTU; 14; 1884-2010)
Solidago altissima (WS; 3; 1948-1980)
ssp. gilvocanescens (WS; 3; 1948-1980)
Solidago americana (SRP; 1; 1911)
Solidago canadensis (EWU, ID, MONT, PLU, PNNL, PSM, UWB, V, WCW, WS, WSTC, WTU, WWB; 74; 1892-2014)
var. canadensis (WTU; 2; 2006)
var. procera (WS; 1; 1892)
Solidago curtisii (WS; 3; 1898-1923)
Solidago elongata (EWU, HPSU, MONT, PLU, REED, SOC, UBC, WS, WTU; 120; 1886-2019)
Solidago gigantea (OSC, WTU; 7; 1893-1949)
Solidago glutinosa (WTU; 18; 1882-1995)
ssp. glutinosa (WTU; 1; 1934)
var. bellidifolia (WTU; 12; 1882-1995)
var. glutinosa (WTU; 5; 1890-1936)
Solidago lepida (EVE, ID, MONT, NOCA, OSC, PNNL, PSM, RM, UWB, WCW, WS, WSTC, WTU, WWB; 204; 1880-2019)
ssp. fallax (WS, WTU; 10; 1902-1937)
var. lepida (WTU; 4; 1949-2019)
var. salebrosa (EVE, ID, MONT, NOCA, OSC, PNNL, PSM, RM, UWB, WCW, WS, WSTC, WTU, WWB; 187; 1880-2019)
Solidago missouriensis (EVE, HPSU, ID, OSC, PLU, PSM, RM, SRP, WCW, WS, WTU, WWB; 97; 1882-2016)
Solidago multiradiata (EWU, HPSU, ID, MORA, NOCA, OSC, PLU, PSM, REED, UBC, WCW, WS, WSTC, WTU, WWB; 186; 1890-2016)
Solidago rigida (WS, WTU; 13; 1904-1937)
ssp. glabrata (WS, WTU; 13; 1904-1937)
Solidago simplex (HPSU, NY, OSC, PLU, PSM, UBC, WS, WTU, WWB; 75; 1880-2017)
var. nana (HPSU, NY, OSC, PLU, UBC, WS, WTU, WWB; 37; 1880-2011)
var. racemosa (PLU; 1; 1908)
var. simplex (OSC, PLU, UBC, WS, WTU, WWB; 30; 1889-2017)
Solidago spathulata (EWU, ID, PLU, WCW, WTU; 10; 1892-1987)
Solidago uliginosa (WTU; 1; 1890)
Soliva sessilis (ID, IDE, OSC, SRP, V, WS, WTU; 47; 1991-2020)
Sonchus arvensis (BBLM, EWU, ID, IDE, NOCA, OSC, PLU, PNNL, PSM, WS, WSTC, WTU, WWB; 103; 1897-2018)
ssp. arvensis (OSC, WS, WTU; 25; 1897-2018)
ssp. uliginosus (ID, NOCA, OSC, PNNL, WS, WTU, WWB; 31; 1937-2018)
Sonchus asper (ID, NOCA, OSC, PLU, PSM, WCW, WS, WTU, WWB; 128; 1886-2018)
ssp. asper (WTU; 1; 2018)
Sonchus oleraceus (ID, NOCA, OSC, PLU, PNNL, PSM, UBC, WCW, WS, WTU, WWB; 138; 1891-2019)
Stenotus acaulis (OSC, WTU; 2; 2003)
Stenotus lanuginosus (EWU, ID, IDS, NY, OSC, PSM, RM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 64; 1892-2013)
var. lanuginosus (EWU, IDS, OSC, RM, SRP, UBC, WS, WTU, WWB; 37; 1892-2013)
Stephanomeria exigua (EWU; 2; 1936)
Stephanomeria paniculata (NOCA, OSC, PNNL, PSM, WS, WTU; 47; 1880-2018)
Stephanomeria pauciflora (IDE; 1; 1991)
Stephanomeria tenuifolia (EWU, HPSU, ID, IDS, NOCA, OSC, PNNL, PSM, SRP, WCW, WS, WSTC, WTU, WWB; 167; 1879-2018)
Symphyotrichum ascendens (ID, OSC, WS, WTU; 21; 1893-2019)
Symphyotrichum boreale (RM, WTU, WWB; 6; 1978-1999)
Symphyotrichum bracteolatum (EWU, ID, NOCA, OSC, RM, SRP, WCW, WS, WTU, WWB; 138; 1880-2019)
Symphyotrichum campestre (NOCA, OSC, PNNL, PSM, RM, WCW, WS, WSTC, WTU; 44; 1882-2017)
Symphyotrichum chilense (HPSU, OSC, PSM, UBC, WCW, WS, WTU; 14; 1886-2003)
Symphyotrichum ciliatum (NOCA, WS, WTU, WWB; 7; 1931-2018)
Symphyotrichum ×columbianum (PNNL, RM, WS, WTU; 4; 1893-1978)
Symphyotrichum concolor (WWB; 1; 1980)
Symphyotrichum drummondii (WS; 1; 1904)
var. drummondii (WS; 1; 1904)
Symphyotrichum ericoides (ID, MONT, NOCA, OSC, WS, WTU; 92; 1889-2017)
var. ericoides (WTU; 5; 1892-1946)
var. pansum (ID, NOCA, OSC, WS, WTU; 80; 1889-2017)
Symphyotrichum falcatum (WS; 2; 1897-1922)
Symphyotrichum foliaceum (EWU, HPSU, ID, IDS, MORA, NOCA, NY, OSC, PLU, PSM, REED, RM, SOC, SRP, UBC, WS, WSTC, WTU, WWB; 244; 1880-2019)
var. parryi (SOC; 1; 1906)
Symphyotrichum frondosum (ID, OSC, PNNL, WS, WTU; 44; 1905-2015)
Symphyotrichum hallii (OSC, WS, WTU, WWB; 23; 1922-2003)
Symphyotrichum jessicae (EWU, ID, NY, OSC, WS, WTU; 36; 1893-2017)
Symphyotrichum laeve (EWU, ID, NY, OSC, RM, WCW, WS, WTU; 61; 1889-2012)
var. concinnum (WCW; 1; 1910)
var. geyeri (NY, OSC, WS, WTU; 40; 1889-2012)
var. laeve (RM; 1; 1995)
Symphyotrichum lanceolatum (ID, NOCA, OSC, PLU, PNNL, WS, WSTC, WTU, WWB; 24; 1947-2015)
var. hesperium (ID, NOCA, OSC, PLU, PNNL, WS, WSTC, WTU, WWB; 24; 1947-2015)
Symphyotrichum novae-angliae (WS, WTU; 5; 1904-2013)
Symphyotrichum novi-belgii (WTU; 5; 2000-2018)
Symphyotrichum pilosum (WS, WTU; 4; 1943-2015)
var. pilosum (WTU; 2; 2002-2015)
Symphyotrichum praealtum (WTU; 1; 1973)
Symphyotrichum spathulatum (EWU, HPSU, ID, NOCA, OSC, PNNL, PSM, RM, SRP, UBC, WCW, WS, WTU, WWB; 212; 1880-2018)
Symphyotrichum subspicatum (COLO, ID, LINF, NOCA, NY, OSC, PLU, PNNL, SRP, UBC, UWB, WS, WTU, WWB; 299; 1880-2019)
Symphyotrichum subulatum (RM; 1; 1996)
Tanacetum balsamita (ID, WS, WTU; 13; 1916-2006)
Tanacetum bipinnatum (HPSU, PLU, PSM, WCW, WS, WTU, WWB; 38; 1892-2018)
Tanacetum parthenium (EWU, IDE, MONT, NOCA, PSM, USFS, WS, WTU, WWB; 32; 1896-2018)
Tanacetum vulgare (EVE, EWU, ID, IDE, MONT, NOCA, OSC, PLU, PSM, RM, SRP, USFS, UWB, WCW, WS, WTU, WWB; 113; 1922-2020)
Taraxacum alaskanum (WTU; 2; 2019)
Taraxacum ceratophorum (NOCA, PLU, RM, WCW, WTU, WWB; 18; 1909-2016)
Taraxacum erythrospermum (EVE, HPSU, NOCA, PLU, PSM, RM, SRP, UBC, UWB, WCW, WS, WTU, WWB; 72; 1909-2015)
Taraxacum officinale (CIC, EVE, EWU, HPSU, ID, LINF, NOCA, OSC, PLU, PNNL, PSM, RM, UWB, WCW, WS, WTU, WWB; 245; 1886-2019)
ssp. officinale (PSM, WCW; 4; 1950-2008)
Taraxacum scopulorum (WTU; 1; 1934)
Taraxacum taraxacum (EWU, WTU; 4; 1914-1942)
Tetradymia canescens (EWU, ID, IDS, NOCA, OSC, PNNL, PSM, SRP, UBC, V, WS, WTU, WWB; 128; 1878-2016)
Tonestus lyallii (EWU, NOCA, OSC, UBC, V, WS, WTU, WWB; 105; 1882-2018)
Townsendia florifer (EWU, ID, OSC, PNNL, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 132; 1882-2014)
Tragopogon dubius (EVE, EWU, HPSU, ID, IDS, NOCA, OSC, PLU, PNNL, PSM, RM, SRP, WCW, WS, WSTC, WTU, WWB; 206; 1924-2020)
Tragopogon dubius × Tragopogon porrifolius (WS; 1; 1992)
Tragopogon dubius × Tragopogon pratensis (WS; 7; 1945-1993)
Tragopogon dubius/porrifolius (WS; 1; 1992)
Tragopogon dubius/pratensis (WS; 2; 1992)
Tragopogon floccosus (WS, WTU; 9; 1924-2004)
Tragopogon flocosum (OSC; 1; 1991)
Tragopogon mirus (NY, WS, WTU; 18; 1949-2012)
Tragopogon mirus × Tragopogon miscellus (WS, WTU; 4; 2004)
Tragopogon miscellus (WCW, WS, WTU; 12; 1985-2004)
Tragopogon porrifolius (EWU, NOCA, OSC, PLU, PSM, SRP, WCW, WS, WTU, WWB; 63; 1897-2004)
Tragopogon porrifolius × Tragopogon pratensis (WS; 1; 1992)
Tragopogon pratensis (EWU, PLU, PSM, WS, WSTC, WTU; 46; 1916-2018)
Tripleurospermum inodorum (ID, WCW, WS, WTU; 26; 1923-2020)
Tripleurospermum maritimum (ID, IDE, NOCA, PSM, WTU, WWB; 21; 1907-2015)
ssp. maritimum (IDE, WTU; 10; 1986-2000)
var. salinum (WTU; 1; 2004)
Trixis grandiflorum (NY; 1; 1891)
var. obtusifolium (NY; 1; 1891)
Trixis heterophyllum (NY; 2; 1894)
var. cryptopleuroides (NY; 2; 1894)
Troximon grandiflorum (WS; 1; 1891)
var. obtusifolium (WS; 1; 1891)
Troximon heterophyllum (NY, WS; 4; 1894)
var. glabratum (NY, WS; 4; 1894)
Tussilago farfara (ID, IDE, WTU, WWB; 11; 1932-2017)
Uropappus lindleyi (ID, PLU, WCW, WS, WTU; 31; 1880-2019)
Verbesina occidentalis (WTU; 1; 2001)
Wyethia amplexicaulis (EWU, ID, IDS, NOCA, OSC, PLU, PSM, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 118; 1881-2020)
Wyethia angustifolia (PLU, WS, WTU; 7; 1881-2017)
Xanthisma gracile (WS; 1; 1961)
Xanthisma spinulosum (WSTC; 1; 1929)
Xanthium affine (NY; 1; 1893)
Xanthium aridum (WS; 2; 1927)
Xanthium silphiifolium (NY; 1; 1883)
Xanthium spinosum (WCW, WS, WTU; 15; 1893-2005)
Xanthium strumarium (HPSU, ID, IDE, NOCA, NY, OSC, PNNL, PSM, SRP, UBC, WCW, WS, WSTC, WTU, WWB; 128; 1883-2019)
Zinnia violacea (WCW; 1; 1978)