Vascular Plants of Idaho
Asteraceae
Asteraceae
Generated from PNW Herbaria database
November 28, 2020.
145 genus names
909 species/infraspecies names
(names highlighted in brown could not be resolved to an accepted name)
Index to Genera:
A: Achillaea, Achillea, Adenocaulon, Ageratina, Agoseris, Amauriopsis, Ambrosia, Anaphalis, Ancistrocarphus, Antennaria, Anthemis, Aplopappus, Arctium, Arnica, Artem, Artemisia, Artermisia, Askellia, Aster
C: Callistephus, Canadanthus, Carduus, Carthamnus, Carthamus, Centaurea, Chaenactis, Chondrilla, Chrysothamnus, Cichorium, Cirsium, Conyza, Coreopsis, Cota, Cotula, Crepis, Crupina, Cyclachaena
E: Eatonella, Echinops, Enceliopsis, Ericameria, Erigeron, Eriophyllum, Eucephalus, Eupatorium, Eurybia, Euthamia, Eutrochium
F: Filago
H: Haplopappus, Helenium, Helianthella, Helianthus, Heliomeris, Hemizonella, Herrickia, Heterotheca, Hieracium, Hulsea, Hymenatherum, Hymenopappus, Hymenoxys, Hypochaeris
J: Jacobaea
O: Onopordum, Oreostemma
P: Packera, Petasites, Petradoria, Picrosia, Pleiacanthus, Prenanthella, Prenanthes, Psathyrotes, Pseudognaphalium, Psilactis, Psilocarphus, Ptilocalais, Pyrrhopappus, Pyrrocoma
T: Tanacetum, Taraxacum, Tephroseris, Tetradymia, Tetraneuris, Thelesperma, Tonestus, Townsendia, Tragopogon, Triniteurybia, Tripleurospermum, Troximon, Tussilago
U: Uropappus
W: Wyethia
Y: Youngia,
Achillaea douglasii (WTU; 1; 1944)
var. achilleaefolia (WTU; 1; 1944)
Achillea alpina (BBLM-OWY; 1; 2012)
Achillea filipendulina (SRP; 1; 2013)
Achillea millefolium (BBLM, BBLM-OWY, BLMMD, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, WCW, WS, WTU, WWB; 959; 1804-2020)
Achillea nobilis (ID; 1; 2006)
Adenocaulon bicolor (BOIS, CIC, CIC-PYNF, EWU, ID, IDE, IDS, MONT, OSC, PSM, RM, SRP, WS, WTU; 196; 1884-2020)
Ageratina occidentalis (BBLM, BOIS, CIC, CRMO, ID, IDS, OSC, SRP, WS, WTU; 74; 1910-2019)
Agoseris ×agrestis (CIC, ID, IDS, SRP, WTU; 16; 1916-2017)
Agoseris aurantiaca (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, LEA, NY, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 385; 1890-2020)
var. aurantiaca (CIC, CRMO, ID, IDS, NY, OSC, RM, SRP, UBC, WS, WTU; 142; 1890-2020)
var. carnea (ID, NY, RM, SBLM, SRP; 14; 1974-1995)
var. gracilens (IDS; 3; 1941)
var. purpurea (IDS, SRP, WCW, WWB; 9; 1931-2014)
Agoseris ×elata (IDS, SRP; 3; 1941-1993)
Agoseris glauca (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SBLM, SRP, UBC, V, WS, WTU, WWB; 554; 1890-2020)
var. aurantiaca (NY; 1; 2008)
var. dasycephala (BBLM, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, NY, OSC, RM, SRP, WS, WTU, WWB; 266; 1895-2019)
var. glauca (BBLM, BBLM-OWY, CIC, ID, IDS, NY, OSC, RM, SBLM, SRP, UBC, WS, WTU; 112; 1890-2020)
var. scorzoneraefolia (ID; 2; 1944)
var. scorzonerifolia (WTU; 6; 1939-1944)
Agoseris grandiflora (BBLM, BBLM-OWY, BOIS, CIC, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 115; 1891-2018)
var. grandiflora (WS, WTU; 11; 1937-1992)
var. leptophylla (WTU; 1; 2016)
Agoseris heterophylla (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 176; 1884-2020)
var. heterophylla (BOIS, CIC, CRMO, ID, RM, WS, WTU; 46; 1895-2020)
Agoseris monticola (CIC, ID, IDS, SRP, WCW; 11; 1965-2019)
Agoseris nutans (IDE; 1; 1937)
Agoseris parviflora (BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, OSC, RM, SRP, USFS, WS, WTU; 177; 1890-2019)
Agoseris retrorsa (BOIS, CIC, CIC-SHO, ID, IDS, RM, SRP, WWB; 17; 1929-2017)
Agoseris taraxifolia (WTU; 1; 1939)
Amauriopsis dissecta (SRP; 1; 1949)
Ambrosia acanthicarpa (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, SRP, WS, WTU; 89; 1930-2015)
Ambrosia artemisiifolia (BBLM, CIC, ID, IDE, IDS, MONT, SRP, WS, WTU; 56; 1911-2020)
Ambrosia grayi (IDE; 5; 1987)
Ambrosia psilostachya (ID, IDE, IDS, OSC, SRP, WS, WTU; 23; 1924-2007)
Ambrosia tomentosa (BBLM, BBLM-OWY, ID, IDE; 7; 1951-2000)
Ambrosia trifida (BOIS, CIC, ID, SRP; 6; 1920-1983)
Anaphalis margaritacea (BOIS, CIC, CIC-PYNF, CRMO, EWU, ID, IDE, IDS, MONT, OSC, RM, SRP, WCW, WS, WTU, WWB; 514; 1890-2020)
var. margaritaceae (EWU; 1; 1961)
Anaphalis subalpina (ID, WTU; 4; 1910-1934)
Ancistrocarphus filagineus (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, SRP, WS, WTU; 31; 1900-2018)
Antennaria alpina (BOIS, CIC, ID, IDS, SRP, WS, WTU, WWB; 33; 1911-2018)
Antennaria anaphaloides (BOIS, CIC, CIC-PYNF, HPSU, ID, IDS, NY, OSC, RM, SRP, WS, WTU, WWB; 101; 1911-2019)
Antennaria arcuata (BOIS, CIC, CIC-SHO, CRMO, ID, NY, RM, SRP, WS; 18; 1946-2019)
Antennaria argentea (ID; 3; 1907-2011)
Antennaria aromatica (RM; 1; 1991)
Antennaria corymbosa (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, WS, WTU, WWB; 154; 1899-2019)
Antennaria corymbosa × Antennaria racemosa (RM; 1; 1983)
Antennaria dimorpha (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SBLM, SRP, WS, WTU, WWB; 177; 1895-2019)
Antennaria dioica (CIC, ID, SRP, WTU; 9; 2005-2016)
Antennaria flagellaris (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDS, OSC, RM, SRP, WS, WTU; 58; 1922-2019)
Antennaria geyeri (SRP; 1; 2011)
Antennaria howellii (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 66; 1902-2020)
ssp. howellii (ID, IDS, OSC, WS, WTU; 30; 1902-2020)
ssp. neodioica (BOIS, CIC, CIC-PYNF, ID, MONT, RM, WS, WTU; 29; 1923-2020)
var. howellii (WS; 1; 1926)
Antennaria lanata (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SBLM, SRP, WS, WTU, WWB; 167; 1932-2020)
Antennaria luzuloides (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, MONT, OSC, PSM, RM, SRP, WCW, WS, WTU, WWB; 403; 1884-2020)
ssp. aberrans (BOIS, SRP, WWB; 4; 1979-2012)
ssp. luzuloides (CIC, ID, IDS, SRP, WS; 48; 1892-2020)
Antennaria media (BOIS, CIC, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU; 103; 1902-2020)
ssp. media (IDS; 2; 1941)
Antennaria microphylla (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, WCW, WS, WTU, WWB; 1100; 1891-2020)
var. majus (ID; 4; 2010-2011)
Antennaria monocephala (CIC; 1; 1964)
ssp. monocephala (CIC; 1; 1964)
Antennaria neglecta (BOIS, CIC, ID, IDE, IDS, OSC, SRP, WS, WTU; 42; 1900-2019)
var. neglecta (ID; 1; 2003)
Antennaria neodioica (OSC; 2; 1922-1952)
var. howellii (OSC; 1; 1922)
var. neodioica (OSC; 1; 1952)
Antennaria parvifolia (BOIS, CIC, CIC-PYNF, ID, IDS, RM, SRP, WS, WTU; 29; 1926-2019)
Antennaria plantaginifolia (ID; 1; 1912)
Antennaria pulcherrima (CIC-PYNF, ID, IDS, OSC, RM, SRP, WS, WTU; 25; 1902-2017)
Antennaria racemosa (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, PSM, RM, SRP, WS, WTU, WWB; 322; 1890-2020)
Antennaria stenophylla (BBLM-OWY, CIC, CIC-SHO, CRMO, DPP, ID, IDS, SRP, UBC, WS, WTU; 56; 1941-2018)
Antennaria umbrinella (BOIS, CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, WS, WTU, WWB; 200; 1895-2020)
Anthemis arvensis (BBLM, ID, SRP, WWB; 14; 1897-1995)
Anthemis cotula (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, USFS, WS, WTU; 84; 1895-2019)
Aplopappus acaulis (WTU; 8; 1931-1947)
var. glabratus (WTU; 1; 1937)
Aplopappus lanceolatus (CIC; 1; 1902)
Aplopappus lanuginosus (WTU; 8; 1937-1950)
ssp. andersonii (WTU; 1; 1950)
var. andersonii (WTU; 4; 1937)
Aplopappus macronema (WTU; 3; 1936-1937)
Aplopappus suffruticosus (WTU; 4; 1936-1939)
Aplopappus uniflorus (MONT, WTU; 2; 1947)
Arctium minus (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU; 75; 1911-2013)
Arnica alpina (OSC, SRP; 3; 1895)
Arnica amplifolia (NY; 1; 1897)
Arnica chamissonis (BBLM, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 150; 1895-2016)
Arnica chamissonis × Arnica mollis (IDS; 1; 1937)
Arnica cordata (SRP; 2; 2012-2016)
Arnica cordifolia (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, EWU, ID, IDE, IDS, MONT, NY, OSC, PSM, RM, SBLM, SRP, UBC, V, WCW, WS, WTU, WWB; 784; 1884-2020)
Arnica cordifolia × Arnica latifolia (WS; 2; 1943)
Arnica discoidea (SRP; 1; 2008)
Arnica fulgens (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, SRP, WS, WTU; 80; 1895-2017)
Arnica gracilis (CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, UBC, WS, WTU; 107; 1927-2020)
Arnica gracilis × Arnica longifolia (WTU; 1; 1982)
Arnica hardiniae (WS; 1; 1927)
Arnica lanceolata (ID, IDS, OSC, RM, SRP, WS, WTU; 43; 1914-2020)
ssp. prima (ID, IDS, OSC, RM, SRP, WS, WTU; 37; 1923-2020)
var. prima (WTU; 1; 2017)
Arnica latifolia (BOIS, CIC, CIC-PYNF, DPP, ID, IDE, IDS, LEA, MONT, OSC, PSM, RM, SRP, UBC, WCW, WS, WTU; 442; 1891-2020)
Arnica lonchophylla (ID, IDS; 2; 1911-1931)
Arnica longifolia (BOIS, CIC, HPSU, ID, IDS, MONT, NY, OSC, RM, SRP, UBC, WS, WTU; 152; 1895-2020)
ssp. myriadena (ID; 1; 1969)
Arnica mollis (BBLM, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, WCW, WS, WTU, WWB; 218; 1910-2020)
ssp. genuina (MONT, WTU; 5; 1936-1944)
var. mollis (WTU; 1; 1946)
Arnica multiflora (OSC; 1; 1891)
Arnica nevadensis (IDS; 1; 1970)
Arnica ovata (CIC, ID, IDS, OSC, SRP, UBC, WS, WTU; 71; 1911-2020)
Arnica parryi (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, UBC, WCW, WS, WTU; 69; 1896-2018)
Arnica rhizomata (IDS; 1; 1939)
Arnica rydbergii (CIC, ID, IDS, RM, SRP, WS, WTU; 49; 1930-2018)
Arnica sororia (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, EWU, ID, IDS, MONT, NY, OSC, RM, SRP, WCW, WS, WTU, WWB; 226; 1892-2020)
Arnica subplumosa (WTU; 1; 1910)
Arnica teucriifolia (NY, RM; 2; 1895)
Artem sororia (IDS; 1; 1997)
Artemisia abrotanum (ID, IDE, MONT, WS; 6; 1937-1988)
Artemisia absinthium (BBLM-OWY, BOIS, CIC, ID, IDE, IDS, MONT, OSC, RM, SRP, USFS, WCW, WS, WTU; 57; 1907-2019)
Artemisia alpina (BBLM; 1; 1980)
Artemisia arbuscula (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, WS, WTU, WWB; 301; 1902-2019)
ssp. arbuscula (BBLM-OWY, CIC, ID, IDS, RM, SRP, WS, WTU; 69; 1911-2018)
ssp. longiloba (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, ID, MONT, SRP, WS, WTU; 50; 1950-2019)
ssp. thermopola (BBLM-OWY, BOIS, CIC, ID, IDS, SRP, WTU; 25; 1950-2017)
Artemisia biennis (BBLM, BOIS, CIC, CIC-SHO, ID, IDE, IDS, OSC, RM, SRP, WS, WTU, WWB; 67; 1895-2016)
Artemisia bigelovii (OSC; 1; 2005)
Artemisia campestris (CIC, ID, WS, WWB; 6; 1924-1990)
var. borealis (ID, WS, WWB; 5; 1924-1990)
Artemisia cana (BBLM, BBLM-OWY, CIC, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SRP, WCW, WS, WTU, WWB; 99; 1892-2016)
ssp. bolanderi (BBLM-OWY, CIC; 6; 1971-2013)
ssp. cana (ID, OSC; 3; 1949-2008)
ssp. viscidula (BBLM-OWY, CIC, ID, IDS, MONT, OSC, RM, SRP, WS; 42; 1899-2016)
Artemisia douglasiana (CIC, ID, IDE, IDS, SRP, WS, WTU; 27; 1892-2015)
Artemisia dracunculus (BBLM, BBLM-OWY, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 167; 1895-2020)
Artemisia frigida (BOIS, CIC, ID, IDS, OSC, RM, SRP, WS, WWB; 65; 1937-2019)
Artemisia longifolia (ID, WS, WWB; 3; 1916-1980)
Artemisia ludoviciana (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 657; 1891-2020)
ssp. albula (ID; 2; 1974)
ssp. candicans (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, OSC, RM, SRP, WCW, WS, WTU; 155; 1892-2020)
ssp. incompta (BBLM, BBLM-OWY, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 133; 1891-2020)
ssp. lindleyana (ID, IDS; 4; 1914-1962)
ssp. ludoviciana (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, ID, IDS, MONT, NY, OSC, RM, SRP, WCW, WS, WTU; 167; 1899-2020)
ssp. michanxiana (WTU; 1; 1939)
Artemisia michauxiana (BBLM, CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, WS; 57; 1895-2020)
Artemisia norvegica (ID; 1; 1992)
Artemisia nova (BOIS, CIC, ID, IDS, OSC, SBLM, SRP, WS, WTU; 82; 1931-2019)
Artemisia nuttallii (BBLM, BOIS, CIC, ID, IDS, OSC, SBLM, SRP, WS, WTU; 81; 1938-2019)
Artemisia packardiae (BBLM, BBLM-OWY, BOIS, CIC, ID, OSC, SRP, WS, WTU; 37; 1979-2015)
Artemisia papposa (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, COLO, ID, IDS, NY, OSC, SRP, WS, WTU; 115; 1946-2018)
Artemisia potens (NY, RM; 4; 1911)
Artemisia potentilloides (BBLM, CIC, ID, IDS, OSC, SBLM, SRP, WS, WTU; 14; 1941-2018)
var. nitrophila (BBLM, IDS, OSC, SRP, WS; 6; 1941-2012)
var. potentilloides (CIC, IDS, SBLM, WTU; 4; 1981-2018)
Artemisia rigida (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDS, RM, SRP, WS; 62; 1927-2019)
Artemisia rothrockii (ID, IDS; 2; 1941-1969)
Artemisia spiciformis (BBLM, CIC, ID, IDS, OSC, SRP, WS; 10; 1895-2012)
Artemisia spinescens (BBLM, BOIS, CIC, ID, IDE, IDS, MONT, OSC, SRP, UBC, WS, WTU; 117; 1914-2019)
Artemisia tilesii (ID, IDS, RM, WS, WTU; 14; 1910-2000)
Artemisia tridentata (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 798; 1895-2019)
f. parishii (ID; 1; 1968)
ssp. tridentata (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 164; 1926-2019)
ssp. vaseyana (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 262; 1927-2019)
ssp. wyomingensis (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, OSC, SRP, WS, WTU; 70; 1949-2019)
var. trifida (WTU; 1; 1952)
Artemisia tripartita (BBLM, BOIS, CIC, CIC-SHO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, WS, WTU; 153; 1902-2019)
ssp. tripartita (CIC, ID, IDE, IDS, OSC, SRP, WS, WTU; 35; 1937-2018)
var. tripartita (ID, MONT, RM; 3; 1958-2011)
Artemisia vulgaris (IDE, IDS, SRP, UBC, WS; 11; 1950-2014)
Artermisia arbuscula (SRP; 1; 2005)
ssp. thermopola (SRP; 1; 2005)
Askellia pygmaea (BBLM, BOIS, CIC, ID, WS, WTU; 24; 1937-2018)
Aster alpinus (CIC, SRP, WTU; 5; 1912-2019)
ssp. vierhapperi (CIC; 2; 1974)
Aster chilensis (WTU; 7; 1952-1953)
var. adscendens (WTU; 7; 1952-1953)
Aster chilensis × Aster eatonii (WTU; 1; 1939)
Aster coerulescens (IDS; 6; 1934-1938)
var. laetevirens (IDS; 6; 1934-1938)
Aster congifolius (ID; 1; 2016)
Aster cusickii (BOIS, CIC; 3; 1974-2011)
var. cusickii (BOIS, CIC; 3; 1974-2011)
Aster eatonii × Aster foliaceus (WTU; 1; 1952)
Aster eatonii × Aster occidentalis (WTU; 1; 1936)
Aster eriocaulis (NY; 1; 1892)
Aster foliaceus × Aster hendersonii (WTU; 2; 1939-1954)
Aster foliaceus × Aster laevis (WTU; 3; 1938-1947)
Aster foliaceus × Aster occidentalis (WTU; 1; 1951)
Aster foliaceus × Aster subspicatus (WTU; 1; 1960)
Aster graminifolius (SRP; 1; 1991)
Aster hendersonii × Aster occidentalis var. intermedius (WTU; 1; 1942)
Aster idahoensis (WTU; 5; 1949-1964)
Aster latahensis (NY, RM, WS; 3; 1897)
Aster multiflora (SRP; 1; ?)
Aster oregonus (SRP; 1; 1949)
Balsamorhiza careyana (ID; 1; 2005)
Balsamorhiza deltoidea (CIC-PYNF, PSM; 2; 1928-1964)
Balsamorhiza hispidula (CIC, ID, IDS, NY, OSC, SRP, WS, WTU; 76; 1930-2018)
Balsamorhiza hookeri (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, MONT, OSC, SBLM, SRP, WS, WTU; 157; 1911-2019)
Balsamorhiza hookeri × Balsamorhiza sagittata (SRP; 1; 1975)
Balsamorhiza incana (BBLM, BOIS, CIC, ID, IDS, RM, SRP, UBC, WS, WTU; 39; 1896-2012)
Balsamorhiza incana × Balsamorhiza sagittata (ID, WS, WTU; 9; 1938-1981)
Balsamorhiza macrophylla (BOIS, CIC, ID, IDS, MONT, NY, OSC, RM, SRP, WS, WTU, WWB; 116; 1899-2020)
Balsamorhiza sagittata (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, OSC, PLU, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 583; 1891-2020)
Balsamorhiza serrata (BBLM, CIC, ID, SRP; 11; 1974-2008)
Balsamorhiza ×terebinthacea (ID; 1; ?)
Balsamorhiza ×tomentosa (IDS, SRP; 2; 1989)
Balsamorhiza uintahensis (WS, WTU; 3; 1953)
Bellis perennis (CIC, ID, IDS, SRP; 8; 1935-2019)
Bidens aurea (CIC-PYNF, WCW; 2; 1922-1965)
Bidens beckii (ID; 1; 2001)
Bidens cernua (BBLM, BOIS, CIC, CIC-SHO, CRMO, EWU, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 132; 1910-2020)
Bidens connata (CIC; 2; 1976-1980)
Bidens frondosa (BBLM, BBLM-OWY, CIC, ID, IDE, IDS, SRP, WS, WTU; 41; 1924-2019)
var. frondosa (CIC; 2; 1931)
Bidens tripartita (CIC, IDS, RM, SRP; 5; 1971-1993)
Bidens vulgata (BOIS, CIC, ID, IDE, IDS, SRP, WS, WTU; 24; 1910-2016)
Blepharipappus scaber (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, EWU, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 228; 1884-2019)
Blephir sagittata (IDS; 2; 1977-1978)
Brickellia californica (CIC, ID, IDS, SRP; 8; 1974-2014)
Brickellia grandiflora (BBLM, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 122; 1892-2015)
Brickellia microphylla (BOIS, CIC, ID, IDS, OSC, SRP, UBC, WS, WTU; 53; 1936-2015)
var. microphylla (CIC, ID, OSC, WS, WTU; 12; 1938-2010)
var. scabra (IDS; 1; 1938)
Brickellia oblongifolia (BBLM-OWY, CIC, ID, IDS, OSC, SRP, WS, WTU; 24; 1895-2014)
var. linifolia (CIC, ID, IDS, SRP; 7; 1895-1946)
var. oblongifolia (BBLM-OWY, CIC, ID, SRP, WS; 13; 1910-2014)
Callistephus chinensis (IDS; 1; 1943)
Canadanthus modestus (BOIS, CIC, CIC-PYNF, EWU, ID, IDS, LEA, MONT, OSC, RM, SRP, WS, WTU, WWB; 187; 1895-2020)
Carduus acanthoides (BOIS, ID, IDE, NY, OSC, SRP, WS; 28; 1946-2020)
ssp. acanthoides (ID; 4; 1993-2020)
Carduus cinereus (ID; 1; 1982)
Carduus magnificus (NY, RM, WS; 4; 1910)
Carduus nutans (BBLM, BOIS, CIC, ID, IDE, IDS, NY, OSC, RM, SRP, WS; 55; 1941-2016)
Carduus pycnocephalus (CIC, IDE; 13; 1987-2006)
Carthamnus tinctorius (SRP; 1; 1993)
Carthamus tinctorius (BBLM, CIC; 3; 1954-2014)
Centaurea benedicta (IDS; 1; 1941)
Centaurea biebersteinii (ID, IDS; 2; 2004-2010)
Centaurea cyanus (BBLM, CIC, ID, IDE, IDS, OSC, SRP, WCW, WS, WWB; 33; 1928-2020)
Centaurea diffusa (BBLM, BBLM-OWY, CIC, CIC-SHO, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, WS, WTU; 49; 1933-2018)
Centaurea ×gerstlaueri (ID, WS; 4; 1987-2007)
Centaurea jacea (RM, WS; 2; 1978-1989)
Centaurea macrocephala (IDS; 1; 1965)
Centaurea montana (ID, IDE; 8; 1988-2006)
Centaurea nigra (IDE; 5; 1996)
Centaurea nigrescens (IDE; 11; 1989-2007)
Centaurea scabiosa (SRP; 1; 2015)
Centaurea solstitialis (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, NY, RM, SRP, USFS, WS, WTU; 54; 1921-2019)
Centaurea stoebe (BBLM, CIC, CRMO, EWU, ID, IDE, IDS, NY, OSC, PSM, RM, SRP, WCW, WS, WTU; 137; 1934-2020)
ssp. australis (BBLM, CIC, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, WCW, WS, WTU; 122; 1934-2020)
Centaurea ×varnensis (CIC, WTU; 5; 1949-2018)
Centaurea xvarnensis (SRP; 1; 2016)
Chaenactis cheilanthoides (USFS; 1; 1911)
Chaenactis cusickii (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, OSC, SRP, WTU; 35; 1938-2015)
Chaenactis douglasii (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, EWU, HPSU, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, VALE, WCW, WS, WTU, WWB; 723; 1890-2020)
var. alpina (CIC, EWU, HPSU, ID, IDS, OSC, RM, SRP, WTU, WWB; 100; 1895-2020)
var. douglasii (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDS, NY, OSC, RM, SBLM, SRP, UBC, VALE, WCW, WS, WTU, WWB; 230; 1910-2019)
var. ramosior (IDS; 10; 1938-1941)
Chaenactis evermannii (BBLM, BOIS, CIC, CIC-SHO, ID, IDS, OSC, SRP, WS, WTU; 115; 1929-2018)
Chaenactis fremontii (SRP; 1; 2017)
Chaenactis macrantha (BBLM, BOIS, CIC, ID, IDS, OSC, SOC, SRP, WS, WTU; 67; 1937-2019)
Chaenactis mainsiana (RM, USFS; 2; 1912)
Chaenactis nevadensis (IDS; 2; 1941)
Chaenactis stevioides (BBLM, BBLM-OWY, CIC, ID, IDS, OSC, SRP, UBC, WS, WTU; 33; 1937-2019)
Chondrilla juncea (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, OSC, RM, SBLM, SRP, WS, WTU; 76; 1960-2019)
Chrysothamnus humilis (CIC, ID, IDS, WS, WTU; 11; 1941-1987)
Chrysothamnus nauseosus (WTU; 1; 1933)
f. petrophilus (WTU; 1; 1933)
Chrysothamnus nauseosus × Haplopappus greenei (BBLM; 1; 1991)
Chrysothamnus parryi (SRP; 1; 1988)
var. salmonensis (SRP; 1; 1988)
Chrysothamnus plattensis (IDS; 1; ?)
Chrysothamnus puberulus (IDS, LEA; 4; 1939-1961)
Chrysothamnus pumilus (ID, RM; 3; 1911-1934)
var. latus (RM; 2; 1911)
Chrysothamnus viscidiflorus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 546; 1895-2019)
ssp. lanceolatus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, OSC, RM, SRP, WCW, WS, WTU, WWB; 195; 1895-2019)
ssp. puberulus (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, SRP, WTU; 55; 1929-2015)
ssp. viscidiflorus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 170; 1910-2018)
Cichorium intybus (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, RM, SRP, USFS, WCW, WS, WTU; 77; 1927-2017)
Cirsium arvense (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, USFS, WCW, WS, WTU; 172; 1892-2020)
Cirsium brevifolium (BBLM, CIC, ID, IDE, IDS, SRP, UBC, WS, WTU; 69; 1907-2017)
Cirsium brevistylum (ID, IDE, MONT, OSC, WS, WTU; 21; 1884-2019)
Cirsium canescens (IDS, RM; 2; 1951-1997)
Cirsium cymosum (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, OSC, SRP, WS, WTU; 97; 1895-2019)
var. canovirens (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, OSC, SRP, WS, WTU; 96; 1895-2018)
Cirsium discolor (BOIS, IDE; 3; 1948-1992)
Cirsium drummondii (OSC; 1; 1912)
Cirsium eatonii (BBLM, BOIS, CIC, ID, IDS, RM, SRP; 29; 1932-2012)
var. eatonii (CIC; 1; 2012)
var. eriocephalum (IDS, SRP; 2; 2012)
var. murdockii (BBLM, CIC, ID, IDS, SRP; 20; 1939-2010)
Cirsium edule (CIC, IDS; 2; 1941-1954)
Cirsium flodmanii (IDS; 2; 1977-1979)
Cirsium foliosum (ID, IDS, SRP, WS; 37; 1902-2017)
Cirsium hookerianum (CIC, ID, IDS, RM, SRP, WTU; 11; 1932-2005)
Cirsium inamoenum (BBLM-OWY, CIC, CIC-PYNF, CRMO, ID, IDS, NY, OSC, RM, SRP, WS, WTU; 195; 1911-2019)
var. davisii (CIC, IDS, RM, SRP, WTU; 31; 1930-2000)
var. inamoenum (CIC, CIC-PYNF, CRMO, ID, IDS, NY, OSC, RM, SRP, WS, WTU; 147; 1911-2018)
Cirsium neomexicanum (CRMO, ID, IDE, IDS, SRP, WWB; 17; 1932-2007)
Cirsium nuttallii (CRMO; 1; 2002)
Cirsium remotifolium (SRP, WTU; 2; 2015)
Cirsium scariosum (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, LEA, MONT, OSC, RM, SRP, WS, WTU; 182; 1895-2020)
Cirsium undulatum (BBLM, CIC, ID, IDS, OSC, SBLM, SRP, UBC, WS, WTU; 47; 1884-2019)
Cirsium vulgare (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, RM, SRP, USFS, WCW, WS, WTU; 145; 1911-2020)
Conyza canadensis (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, USFS, WS, WTU; 181; 1895-2020)
Coreopsis lanceolata (SRP; 1; 2010)
Coreopsis tinctoria (BOIS, CIC, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 49; 1890-2019)
Cota tinctoria (CIC, ID, IDE, IDS, OSC, SRP, WS, WTU; 17; 1935-2020)
Cotula australis (WTU; 1; ?)
Crepis acuminanta (UBC; 2; 2007)
ssp. acuminata (UBC; 2; 2007)
Crepis acuminata (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, V, WS, WTU; 486; 1892-2020)
Crepis atribarba (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, NY, OSC, RM, SBLM, SRP, UBC, WS, WTU, WWB; 184; 1890-2020)
var. atribarba (ID; 2; 1976-1980)
Crepis bakeri (BBLM-OWY, CIC-PYNF, ID, IDE, OSC, WS, WTU; 37; 1924-2010)
var. idahoensis (WTU; 2; 1949)
Crepis barbigera (CIC, ID, IDS, SRP, WS, WTU; 13; 1893-1995)
Crepis capillaris (ID, IDE, IDS, WS; 12; 1929-2019)
Crepis gracilis (ID, WTU; 4; 1912-1944)
Crepis intermedia (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDS, NY, OSC, RM, SRP, WS, WTU; 116; 1884-2020)
Crepis modocensis (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, WS, WTU, WWB; 218; 1911-2019)
var. modocensis (CIC-SHO, ID, RM, SRP; 13; 1975-2011)
Crepis nana (BOIS; 1; 1979)
var. nana (BOIS; 1; 1979)
Crepis occidentalis (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, OSC, RM, SBLM, SRP, UBC, WS, WTU; 215; 1884-2020)
ssp. cosata (UBC; 1; 2007)
var. conjuncta (SRP; 1; 1978)
Crepis pleurocarpa (ID; 1; 1996)
Crepis runcinata (BOIS, CIC, CRMO, ID, IDS, NY, OSC, RM, SRP, WS; 64; 1911-2019)
ssp. runcinata (BOIS, CIC, ID, IDS, RM, SRP; 41; 1930-2016)
var. runcinata (CRMO, ID, NY, OSC, RM; 6; 1947-2011)
Crepis setosa (ID, IDE; 5; 1971-2004)
Crepis tectorum (ID, IDE, RM; 7; 1991-2012)
Crupina vulgaris (BBLM, BOIS, CIC, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, USFS, WS, WTU, WWB; 72; 1969-2020)
Cyclachaena xanthiifolia (BBLM-OWY, CIC, CRMO, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 69; 1895-2012)
Dieteria asteroides (BOIS; 8; 1929-1932)
var. asteroides (BOIS; 8; 1929-1932)
Dieteria bigelovii (ID, WTU; 8; 1972-1999)
var. commixta (ID, WTU; 8; 1972-1999)
Dieteria canescens (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, COLO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 442; 1895-2019)
var. canescens (BBLM-OWY, CIC, ID, IDS, OSC, RM, SBLM, SRP, WS, WTU, WWB; 214; 1895-2019)
var. incana (IDS, OSC, SRP; 3; 2003-2019)
var. leucanthemifolia (IDS; 2; 1941)
var. sessiliflora (BOIS, CIC, COLO, CRMO, ID, NY, OSC, RM, SRP, WS, WTU; 49; 1910-2017)
var. shastensis (ID; 1; 1984)
Dimeresia howellii (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, SRP; 24; 1962-2018)
Eatonella nivea (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, SRP, UBC; 31; 1947-2011)
Echinops sphaerocephalus (ID; 1; 1971)
Enceliopsis nudicaulis (BBLM, BOIS, CIC, ID, IDS, OSC, SBLM, SRP, UBC, WS, WTU; 107; 1931-2019)
Ericameria bloomeri (BOIS, CIC, ID, IDS, MONT, OSC, WTU; 16; 1895-2012)
Ericameria discoidea (BBLM-OWY, BOIS, CIC, CIC-SHO, ID, IDE, IDS, SRP, WCW, WS, WTU; 80; 1936-2018)
var. discoidea (BBLM-OWY, ID, IDE, IDS; 34; 1936-2011)
Ericameria greenei (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDS, OSC, SRP, WCW, WTU; 88; 1930-2019)
Ericameria linearis (ID; 1; 2011)
Ericameria nana (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, NY, OSC, RM, SRP, WTU; 91; 1907-2019)
Ericameria nauseosa (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, WCW, WS, WTU, WWB; 599; 1884-2019)
ssp. consimilis (SRP; 1; 2017)
var. bigelovii (SRP; 1; ?)
var. graveolens (BBLM-OWY, CIC, ID, IDS, NY, RM, SRP, WCW, WTU; 51; 1939-2017)
var. hololeuca (BBLM-OWY, CIC, ID, IDS, MONT, SRP, WS; 44; 1929-2019)
var. nana (BBLM-OWY, CIC, ID, SRP, WS, WTU; 18; 1927-2009)
var. nauseosa (ID, IDS, LEA, MONT, RM, SRP, WTU; 26; 1911-2012)
var. oreophila (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, WS, WTU; 199; 1895-2017)
var. speciosa (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, OSC, RM, SRP, WS, WTU, WWB; 116; 1884-2019)
Ericameria parryi (BBLM, BBLM-OWY, CIC, ID, IDE, IDS, OSC, RM, SBLM, SRP, UBC, WS, WTU; 46; 1936-2006)
var. affinis (IDS; 1; 1944)
var. attenuata (IDS, OSC, SRP, WTU; 5; 1941-1951)
var. howardii (IDS; 1; 1939)
var. montana (CIC, ID, RM; 8; 1957-1992)
var. salmonensis (BBLM, CIC, ID, IDS, SBLM, UBC, WTU; 21; 1950-1988)
Ericameria resinosa (CIC, ID, WS; 7; 1927-1993)
Ericameria suffruticosa (BBLM, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU, WWB; 151; 1910-2019)
Ericameria winwardii (RM; 1; 2002)
Erigeron acris (CIC-PYNF, ID, IDS, OSC, PSM, RM, SRP, WS, WTU; 58; 1890-2019)
var. kamtschaticus (CIC-PYNF, ID, IDS, OSC, RM, SRP, WS, WTU; 42; 1891-2019)
Erigeron annuus (BBLM, BBLM-OWY, CIC, ID, IDE, IDS, RM, SRP, WS, WTU; 28; 1910-2019)
Erigeron aphanactis (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, OSC, SRP, UBC, WS, WTU; 56; 1929-2019)
var. aphanactis (BBLM-OWY, CIC, CRMO, OSC, WS, WTU; 18; 1946-2010)
Erigeron asperugineous (SRP; 2; 2002-2009)
Erigeron asperugineus (BOIS, CIC, ID, IDS, MONT, WS, WTU, WWB; 106; 1936-2020)
Erigeron aureus (BBLM; 1; 1992)
Erigeron bloomeri (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDS, NY, OSC, RM, SRP, WS, WTU; 175; 1910-2020)
var. bloomeri (BBLM, BBLM-OWY, CIC, CIC-PYNF, CIC-SHO, ID, IDS, OSC, RM, SRP, WS, WTU; 52; 1911-2018)
Erigeron caespitosus (ALA, CIC, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU, WWB; 96; 1895-2019)
Erigeron castoreus (ID, SRP; 2; 2003)
Erigeron cervinus (OSC; 2; 1937-1989)
Erigeron chrysopsidis (BBLM, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, NY, OSC, SRP, VALE, WS, WTU; 119; 1912-2019)
var. austiniae (BBLM, CIC, CRMO, ID, IDS, NY, OSC, SRP, WS, WTU; 69; 1912-2019)
var. chrysopsidis (CIC, CIC-SHO, ID, WTU; 7; 1952-2016)
Erigeron compactus (ID; 1; 1941)
Erigeron compositus (BBLM, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, PSM, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 525; 1890-2020)
var. breviradiatus (NY, RM; 3; 1911)
var. glabellus (SRP; 1; 1975)
var. petraeus (NY, RM; 2; 1916)
Erigeron concinnus (BBLM-OWY, CIC, CRMO, ID, IDS, NY, RM, SRP, WS, WTU; 78; 1892-2018)
var. concinnus (CIC, CRMO, ID, IDS, NY, RM, SRP, WTU; 46; 1939-2018)
var. condensatus (ID, IDS, WS; 7; 1950-1971)
Erigeron consimilis (ID, SRP; 3; 2011)
Erigeron corymbosus (BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SBLM, SRP, WS, WTU; 137; 1892-2019)
Erigeron coulteri (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 161; 1895-2020)
Erigeron cronquistii (IDS; 1; 2012)
Erigeron davisii (CIC, ID, IDS, OSC, SRP, WS, WTU; 31; 1938-2018)
Erigeron disparifolius (OSC, WTU; 2; 1969)
Erigeron disparipilus (BBLM, CIC, ID, IDS, SRP, WS, WTU; 60; 1946-2017)
Erigeron divergens (BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, WTU; 159; 1911-2020)
Erigeron eatonii (BBLM, BOIS, CIC, CIC-PYNF, ID, IDS, NY, OSC, RM, SBLM, SRP, WCW, WS, WTU, WWB; 256; 1895-2019)
ssp. eatonii (ID; 3; 1947-1950)
var. eatonii (CIC, ID, IDS, NY, OSC, RM, SRP, WTU, WWB; 37; 1965-2016)
var. lavandulus (BBLM, CIC, CIC-PYNF, ID, IDS, NY, OSC, RM, WTU; 43; 1937-2000)
var. villosus (CIC, CIC-PYNF, ID, IDS, OSC, RM, SBLM, SRP, WCW, WS, WTU, WWB; 73; 1895-2019)
Erigeron elatus (ID, WTU; 2; 1956-1970)
Erigeron engelmannii (BBLM, ID, NY, OSC, RM, SRP, WS, WTU; 29; 1910-2008)
Erigeron evermannii (CIC, ID, IDS, SRP, WS, WTU, WWB; 60; 1936-2017)
Erigeron filifolius (CIC, ID, IDS, OSC, SRP, WS, WTU; 104; 1911-2019)
Erigeron foliosus (ID, SRP; 3; 2006-2017)
var. confinis (ID; 1; 2006)
Erigeron formosissimus (CIC, IDS, RM, SRP; 7; 1979-2012)
Erigeron glabellus (BOIS, CIC, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, WS, WTU; 88; 1895-2019)
ssp. glabellus (ID, OSC, WTU; 4; 1949-2003)
var. glabellus (CIC, ID, IDS, NY, RM, SRP, WS, WTU; 39; 1911-2017)
Erigeron glacialis (BOIS, CIC, CIC-PYNF, EWU, ID, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 393; 1895-2020)
var. glacialis (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 367; 1895-2020)
Erigeron gracilis (BOIS, CIC, CIC-SHO, ID, IDS, RM, SBLM, SRP, WS, WTU, WWB; 30; 1939-2011)
Erigeron grandiflorus (CIC, ID, IDS, MONT, RM, SRP, WS, WTU, WWB; 109; 1936-2018)
Erigeron hispidissimus (ID; 1; 1912)
Erigeron humilis (ID; 10; 1979-1991)
Erigeron inornatus (RM; 1; 2000)
var. inornatus (RM; 1; 2000)
Erigeron jonesii (CIC, WTU; 2; 1969-1974)
Erigeron latus (BBLM-OWY, CIC, ID, IDS, NY, RM, SRP, WTU; 34; 1912-2018)
Erigeron leiomerus (BOIS, ID, IDS, RM, SRP, WTU; 42; 1936-2014)
Erigeron linearis (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 147; 1891-2019)
Erigeron lonchophyllus (BOIS, CIC, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, WS, WTU; 102; 1891-2016)
Erigeron nanus (BBLM, CIC, ID, IDS, SRP, WS, WTU; 31; 1912-2005)
Erigeron nivalis (CIC, CIC-PYNF, ID, IDS, MONT, OSC, SRP, WS, WTU; 114; 1895-2020)
Erigeron ochroleucus (WTU; 1; 2016)
Erigeron ovalifolium (ID; 2; 2017)
var. depressum (ID; 2; 2017)
Erigeron peregrinus (BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, SRP, WTU; 115; 1912-2015)
var. peregrinus (ID, SRP, WTU; 9; 1996-2015)
Erigeron peucephyllus (WTU; 3; 1912)
var. bloomeri (WTU; 3; 1912)
Erigeron philadelphicus (CIC, ID, IDE, IDS, RM, SRP, WS, WTU; 26; 1924-2020)
var. philadelphicus (ID, RM; 4; 1999-2020)
Erigeron poliospermus (BBLM, IDS, OSC, SRP; 7; 1895-2014)
var. poliospermus (IDS, SRP; 2; 2010)
Erigeron pumilus (BBLM, BBLM-OWY, BLMMD, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 620; 1884-2019)
var. concinnioides (WTU; 1; 1971)
var. intermedius (BBLM, BBLM-OWY, BLMMD, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDS, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 391; 1884-2019)
var. pumilus (BBLM-OWY, IDS, RM, SRP; 7; 1991-2016)
Erigeron radicatus (ID, RM, SRP; 18; 1945-2019)
Erigeron rydbergii (BOIS, CIC, ID, IDS, RM, UBC, WTU, WWB; 11; 1969-2009)
Erigeron salishii (BOIS; 1; 1994)
Erigeron salmonensis (ID, NY, OSC, SRP; 13; 1981-2011)
Erigeron salsuginosa (SRP; 1; 1913)
Erigeron salsuginosus (IDS, WTU; 10; 1932-1941)
Erigeron speciosus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 600; 1884-2019)
Erigeron strigosus (CIC, CIC-PYNF, ID, IDS, MONT, RM, SRP, WCW, WS, WTU, WWB; 101; 1904-2017)
var. septentrionalis (CIC, IDS, SRP, WS, WTU; 14; 1937-2017)
var. strigosus (CIC, CIC-PYNF, ID, IDS, RM, SRP, WS, WTU; 23; 1910-2016)
Erigeron subtrinervis (BOIS, ID, IDS, SRP, WS, WTU; 37; 1942-2019)
Erigeron tener (CIC, ID, IDS, MONT, SBLM, SRP, WS, WTU; 45; 1911-2019)
Erigeron tweedyi (BBLM, CIC, ID, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 66; 1895-2016)
Erigeron uintahensis (ID; 2; 1973-1974)
Erigeron uniflorus (ID, WTU; 2; 1939)
Erigeron ursinus (CIC, ID, IDS, MONT, NY, RM, SRP, WTU, WWB; 49; 1897-2020)
Erigeron vetensis (IDS; 1; 1936)
Erigeron watsonii (ID; 1; 1972)
Eriophyllum gracile (MONT; 1; 1911)
Eriophyllum gracilis (SRP; 2; 1914-1932)
Eriophyllum lanatum (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 619; 1884-2020)
var. achillioides (BOIS, CIC, ID, SRP; 4; 1972-2015)
var. integrifolium (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 333; 1895-2018)
var. lanatum (CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, V, WS, WTU, WWB; 99; 1927-2019)
Eriophyllum pedunculatum (NY, WS; 2; 1896)
Eucephalus elegans (BBLM, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, MONTU, OSC, RM, SRP, WS, WTU, WWB; 221; 1895-2020)
Eucephalus engelmannii (BOIS, CIC, ID, IDS, RM, SRP, WS, WTU, WWB; 115; 1911-2019)
Eupatorium occidentale (NY, RM; 2; 1910)
var. decemplex (NY, RM; 2; 1910)
Eurybia conspicua (BBLM, BOIS, CIC, ID, IDS, LEA, MONT, OSC, RM, SRP, UBC, WS, WTU; 186; 1883-2017)
Eurybia integrifolia (BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 347; 1895-2019)
Eurybia merita (CIC, ID, IDS, OSC, RM, SRP, WTU; 16; 1892-2020)
Eurybia sibirica (ID, SRP, WS, WTU; 14; 1936-2016)
Euthamia graminifolia (ID; 4; 1976-2007)
Euthamia occidentalis (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, SRP, WTU; 71; 1895-2020)
Eutrochium maculatum (IDE, IDS; 4; 1935-1988)
Filago arvensis (BBLM-OWY, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, OSC, RM, SBLM, SRP, UBC, WS, WTU; 78; 1932-2020)
Filago filaginoides (CRMO, ID, NY; 4; 1934-2002)
Gaillardia aristata (BOIS, CIC, CRMO, ID, IDE, IDS, MONTU, OSC, PSM, SRP, WS, WTU, WWB; 146; 1891-2020)
Gaillardia integerrima (NY; 1; 1892)
Gaillardia pulchella (IDS; 1; 1931)
Galinsoga parviflora (IDE; 1; 1999)
Glyptopleura marginata (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, OSC, SRP, WTU; 29; 1936-2017)
Gnaphalium exilifolium (IDS; 1; 1937)
Gnaphalium palustre (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, DPP, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU; 256; 1884-2020)
Gnaphalium uliginosum (ID, IDS; 6; 1913-2020)
Grindelia brownii (NY; 2; 1896)
Grindelia hirsutula (BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, LEA, NY, OSC, RM, SRP, WCW, WS, WTU; 76; 1891-2016)
Grindelia howellii (ID, IDS, OSC, RM, SRP, WS, WTU; 30; 1894-1990)
Grindelia integerrima (NY; 1; 1892)
Grindelia integrifolia (MONT; 1; 1911)
Grindelia nana (MONT; 1; 1911)
var. brownii (MONT; 1; 1911)
Grindelia oregana (SRP; 1; 1928)
Grindelia paysonorum (RM; 1; 1926)
Grindelia squarrosa (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, OSC, RM, SBLM, SRP, UBC, WS, WTU, WWB; 157; 1911-2019)
Gutierrezia sarothrae (BBLM, BOIS, CIC, CIC-SHO, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU, WWB; 128; 1892-2019)
Haplopappus acaulis (WTU; 4; 1944)
ssp. acaulis (WTU; 4; 1944)
Haplopappus andersoni (SRP; 2; 1924-1930)
Haplopappus carthamoides × Haplopappus radiatus (BBLM; 1; ?)
Haplopappus hirsutus (SRP; 1; 1974)
Haplopappus lanuginosus (WTU; 1; 1944)
ssp. lanuginosus (WTU; 1; 1944)
Haplopappus suffruticosus (WTU; 3; 1944)
ssp. suffruticosus (WTU; 3; 1944)
Haplopappus tealriformis (WTU; 1; 1956)
Helenium autumnale (CIC, ID, IDE, IDS, MONT, OSC, PSM, SRP, WS, WTU; 90; 1903-2019)
Helianthella douglasii (WTU; 1; 1946)
Helianthella quinquenervis (BOIS, ID, IDS, RM, SRP; 15; 1938-2003)
Helianthella uniflora (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, WS, WTU, WWB; 412; 1892-2019)
var. douglasii (BBLM, CIC, CIC-PYNF, ID, IDE, IDS, MONT, OSC, SRP, WTU; 75; 1892-2019)
var. uniflora (CIC, ID, IDS, NY, SRP, WTU; 24; 1949-2018)
Helianthus annuus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, OSC, RM, SRP, UBC, WCW, WS, WTU; 140; 1890-2015)
Helianthus cusickii (BBLM, CIC, ID, IDS, SRP, WS, WTU; 25; 1911-2018)
Helianthus douglasii (NY; 1; 1892)
Helianthus nuttallii (BBLM, BBLM-OWY, CIC, CIC-SHO, ID, IDS, MONT, NY, OSC, SRP, WS, WTU; 94; 1895-2014)
ssp. nuttallii (ID, IDS, SRP, WS; 19; 1911-2011)
Helianthus petiolaris (CIC, CRMO, ID, IDS, SRP, WCW, WS; 10; 1911-1995)
ssp. fallax (CIC; 1; 1979)
ssp. petiolaris (WS; 1; 1911)
Helianthus pumilus (IDS; 1; 1941)
Helianthus tuberosus (ID, IDE; 3; 1951-1974)
Helianthus uniflora (WTU; 1; 1954)
Heliomeris multiflora (BBLM, BOIS, CIC, ID, IDE, IDS, OSC, RM, SRP, WS, WTU, WWB; 107; 1912-2018)
var. multiflora (ID, IDE, IDS, RM, SRP; 39; 1926-2016)
Hemizonella minima (CIC, ID, IDS, OSC, RM, SRP, WS, WTU; 55; 1895-2020)
Herrickia glauca (IDS, OSC, RM, SRP, WTU; 8; 1939-2004)
var. glauca (RM; 1; 1999)
Heterotheca barbata (NY; 1; 1892)
Heterotheca cinerascens (ID; 10; 1936-2006)
Heterotheca hirsuta (ID; 7; 1951-2004)
Heterotheca hispida (ID; 15; 1916-2010)
Heterotheca orsoensis (ID; 3; 1984-2002)
Heterotheca vespertina (ID; 5; 1913-1997)
Heterotheca villosa (BLMMD, BOIS, CIC, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, WS, WTU; 98; 1891-2019)
var. depressa (ID; 3; 1945-1996)
var. foliosa (CIC, WTU; 2; 1954-1976)
var. minor (CIC, CRMO, ID, IDS, OSC, SRP, WS, WTU; 38; 1891-2019)
var. nana (RM; 1; 1992)
var. scabra (WTU; 3; 1951)
var. villosa (BOIS, IDE, IDS, RM, SRP, WS, WTU; 27; 1924-2014)
Heterotheca viscida (IDS; 2; 1937-1939)
Heterotheca zionensis (ID; 1; 1952)
Hieracium absonun (RM; 1; 1916)
Hieracium albiflorum (BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, WCW, WS, WTU; 411; 1890-2020)
Hieracium ambiguum (WS; 6; 1900-1950)
Hieracium aurantiacum (BOIS, CIC, ID, IDE, MONT, SRP, WS, WTU; 50; 1974-2020)
Hieracium caespitosum (CIC, ID, IDE, OSC, SRP, WS, WTU; 40; 1979-2016)
Hieracium flagellare (WTU; 4; 2006-2011)
Hieracium ×floribundum (ID; 1; 2019)
Hieracium glomeratum (ID; 21; 2016-2020)
Hieracium griseum (NY; 1; 1897)
Hieracium laevigatum (IDE; 1; 2003)
Hieracium onosmoides (WS; 1; 1992)
Hieracium rydbergii (NY, WWB; 2; 1897-1939)
Hieracium sabaudum (ID, IDE; 2; 2002)
Hieracium scouleri (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, EWU, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, VALE, WCW, WS, WTU, WWB; 580; 1884-2020)
var. cynoglossoides (WTU; 3; 1944-1950)
Hieracium triste (BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, LEA, NY, OSC, RM, SRP, WS, WTU; 233; 1890-2020)
Hieracium umbellatum (CIC, EWU, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, WS, WTU; 68; 1897-2020)
Hulsea algida (BOIS, CIC, ID, IDS, OSC, RM, SRP, WCW, WS, WTU, WWB; 128; 1911-2020)
Hymenatherum aureum (WTU; 1; 2003)
Hymenopappus filifolius (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, MONT, OSC, RM, SBLM, SRP, WCW, WS, WTU, WWB; 131; 1895-2019)
var. filifolius (CIC, ID, IDS, OSC, SRP; 8; 1979-2016)
var. idahoensis (BBLM, BOIS, CIC, ID, IDS, RM, SBLM, SRP, WS, WTU, WWB; 86; 1911-2019)
Hymenoxys canescens (WTU; 1; 1932)
Hymenoxys cooperi (IDS, NY, OSC, SRP; 5; 1932-2019)
Hymenoxys grandiflora (BOIS, ID, IDS, RM, SRP, WS, WTU, WWB; 47; 1927-2016)
Hymenoxys hoopesii (BOIS, ID, IDS, NY, OSC, RM, SRP, WTU; 38; 1926-2020)
Hymenoxys richardsonii (ID; 1; 1951)
Hypochaeris radicata (ID, IDE, WS; 8; 1914-2020)
Ionactis alpina (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, SBLM, SRP, UBC, WS, WTU, WWB; 189; 1911-2019)
Ionactis stenomeres (BOIS, CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, WS, WTU; 142; 1890-2020)
Iva axillaris (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 170; 1895-2020)
Jacobaea vulgaris (IDE; 18; 1987-2000)
Lactuca biennis (CIC, ID, IDE, IDS, MONT, SRP, WS, WTU; 46; 1910-2020)
Lactuca canadensis (ID, IDS, MONT, WS, WTU; 11; 1924-1970)
Lactuca integrata (BOIS; 1; 1929)
Lactuca ludoviciana (ID, IDE, IDS, WS; 7; 1941-1986)
Lactuca polyphylla (NY; 1; 1889)
Lactuca sativa (IDS; 5; 1930-1941)
Lactuca serriola (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, RM, SRP, USFS, WS, WTU, WWB; 191; 1897-2020)
Lactuca spicata (ID; 1; 1912)
Lactuca tatarica (BBLM, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SBLM, SRP, WS, WTU; 123; 1892-2015)
ssp. pulchella (BBLM, CIC, CRMO, ID, IDE, IDS, MONT, OSC, RM, SBLM, SRP, WS, WTU; 123; 1892-2015)
Lagophylla ramosissima (BBLM, BOIS, CIC, CIC-SHO, ID, OSC, RM, SRP, WS, WTU; 73; 1884-2019)
Lapsana communis (CIC, EWU, ID, IDE, SRP; 22; 1914-2020)
Layia glandulosa (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, NY, OSC, SRP, WS, WTU; 76; 1892-2019)
var. glandulosa (CRMO; 3; 1994-2002)
Leontodon autumnalis (ID, IDE; 3; 1976-2000)
Leontodon saxatilis (CIC; 1; 1975)
ssp. saxatilis (CIC; 1; 1975)
Leucanthemum vulgare (BOIS, CIC, CIC-PYNF, EWU, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, USFS, WCW, WS, WTU; 158; 1914-2020)
Lorandersonia linifolia (CIC; 1; 1975)
Luina grandiflora (WS; 1; 1911)
Lygodesmia dianthopsis (BBLM, CIC, ID, IDS, OSC, SRP; 22; 1937-2015)
Lygodesmia grandiflora (BBLM, BBLM-OWY, CIC-SHO, CRMO, ID, IDS, OSC, SRP, WS, WTU; 84; 1934-2013)
Lygodesmia juncea (ID, IDS, SBLM, SRP, WTU; 8; 1944-2017)
Machaeranthera conmixta (ID; 1; 1984)
Macronema grindelifolium (RM; 1; 1897)
Macronema grindelioides (WTU; 1; 1910)
Madia citrigracilis (ID, OSC; 2; 2002)
Madia citriodora (CIC, ID; 3; 1995-2019)
Madia elegans (WTU; 1; 1952)
Madia exigua (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 120; 1891-2020)
Madia glomerata (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU; 268; 1895-2020)
Madia gracilis (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, WS, WTU, WWB; 208; 1884-2020)
Madia racemosa (IDS; 1; 1944)
Madia sativa (ID, IDE, IDS, OSC, SRP; 12; 1892-2019)
Malacothrix californica (WS; 1; 1911)
Malacothrix glabrata (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, MONT, OSC, SRP, UBC, WS, WTU; 78; 1911-2019)
Malacothrix sonchoides (ID, SRP, WTU; 5; 1938-1971)
Malacothrix torreyi (BBLM, CIC, ID, IDS, MONT, OSC, SBLM, SRP, UBC, WS, WTU; 63; 1936-2019)
Matricaria chamomilla (CIC, IDS, SBLM; 4; 1976-2014)
Matricaria discoidea (BBLM, BBLM-OWY, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, USFS, WCW, WS, WTU; 163; 1884-2019)
Microseris humilis (SRP; 2; 1973-1978)
Microseris laciniata (PSM, SRP; 3; 1964-1973)
Microseris major (IDS; 2; 1941-1946)
var. laciniata (IDS; 1; 1946)
Microseris nutans (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, DPP, ID, IDS, MONT, OSC, RM, SRP, UBC, VALE, WCW, WS, WTU, WWB; 500; 1891-2020)
var. major (IDS; 2; 1938-1941)
Mycelis muralis (ID, IDE; 17; 2002-2020)
Nabalus alatus (ID, IDS; 4; 1939-1982)
Nabalus sagittatus (CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, USFS, WS, WTU; 60; 1895-2020)
Nestotus stenophyllus (BBLM, BOIS, CIC, CIC-SHO, CRMO, HPSU, ID, IDS, MONT, OSC, SRP, V, WS, WTU; 63; 1931-2019)
Nothocalais alpestris (SRP; 1; 2016)
Nothocalais cuspidata (CIC-PYNF, ID, IDE, MONT, WTU, WWB; 11; 1911-1988)
Nothocalais nigrescens (BOIS, CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, UBC, WS, WTU, WWB; 65; 1931-2019)
Nothocalais troximoides (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, ID, IDS, OSC, RM, SBLM, SRP, WS, WTU; 186; 1884-2019)
Onopordum acanthium (CIC, CRMO, ID, IDE, OSC, RM, SRP, WTU; 28; 1945-2020)
ssp. acanthium (ID; 2; 1975-2020)
Oreostemma alpigenum (BOIS, CIC, CIC-PYNF, ID, IDE, IDS, OSC, RM, SRP, WS, WTU, WWB; 93; 1936-2018)
var. alpigenum (IDE, IDS, OSC; 4; 1951-1977)
var. haydenii (BOIS, CIC, CIC-PYNF, ID, IDS, RM, SRP, WS, WTU, WWB; 79; 1936-2018)
Packera aurea (SRP, WCW; 2; 1929-1937)
Packera cana (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, UBC, WS, WTU, WWB; 303; 1890-2020)
Packera contermina (CIC-PYNF, RM, SRP, WS; 9; 1936-2009)
Packera crocata (ID, WS; 3; 1911-1916)
Packera cymbalaria (ID, OSC; 10; 1895-2013)
Packera debilis (BOIS, CIC, ID, IDS, OSC, SBLM, SRP, WS, WTU; 37; 1895-2011)
Packera dimorphophylla (ID, IDS, RM, WS, WTU; 16; 1923-2011)
var. dimorphophylla (ID, IDS, RM, WS; 9; 1923-2002)
var. paysonii (ID, IDS, RM; 4; 1923-2011)
Packera fendleri (ID; 1; 1951)
Packera indecora (BOIS, CIC, ID, IDS, NY, OSC, SRP, WS, WTU, WWB; 42; 1890-2020)
Packera malmstenii (WTU; 4; 1944-1981)
Packera multilobata (CIC, ID, IDS, NY, OSC, SRP, WS, WTU; 79; 1895-2020)
Packera pauciflora (CIC, ID, IDS, SRP; 9; 1930-2010)
Packera paupercula (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, NY, OSC, RM, SRP, WS; 66; 1884-2018)
Packera plattensis (RM; 1; 1992)
Packera pseudaurea (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU; 206; 1895-2020)
var. pseudaurea (BBLM-OWY, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, UBC, WS, WTU; 115; 1895-2020)
Packera streptanthifolia (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, UBC, WS, WTU, WWB; 337; 1911-2020)
Packera subnuda (CIC, ID, IDS, OSC, RM, SRP, WS, WTU; 101; 1897-2020)
var. subnuda (CIC, ID, OSC, WTU; 46; 1897-2020)
Packera werneriifolia (BOIS, CIC, ID, IDS, RM, SRP, UBC, WS, WTU, WWB; 113; 1911-2019)
Petasites frigidus (ID, IDS, OSC; 13; 1891-2002)
var. sagittatus (ID, IDS, OSC; 13; 1891-2002)
Petradoria pumila (CIC, ID, IDS, OSC, SRP, WS, WTU; 25; 1939-2002)
var. pumila (CIC, ID, IDS, OSC, WS, WTU; 11; 1945-1990)
Picrosia longifolia (IDS; 1; 1976)
Pleiacanthus spinosus (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, SRP, WS, WTU; 56; 1931-2010)
Prenanthella exigua (CIC, ID, SRP; 8; 1978-2010)
Prenanthes hastata (ID, WTU; 2; 1950)
Psathyrotes annua (BBLM, BBLM-OWY, CIC, ID, SRP, WTU; 10; 1951-2001)
Pseudognaphalium californicum (ID, WS; 2; 1893)
Pseudognaphalium canescens (ID, OSC, SRP, WS, WTU; 5; 2001)
var. microcephalum (OSC; 1; 2001)
Pseudognaphalium luteoalbum (IDE; 1; 2008)
Pseudognaphalium macounii (CIC, ID, IDS, OSC, PSM, RM, SRP, WS, WTU; 52; 1884-2020)
Pseudognaphalium microcephalum (BOIS, CIC, ID, IDE, IDS, SRP, WS, WTU; 51; 1892-2015)
Pseudognaphalium stramineum (CIC, ID, IDS, MONT, OSC, SRP, WCW, WS, WTU; 38; 1893-2013)
Pseudognaphalium thermale (CIC, ID, IDS, OSC, RM, SRP, WS, WTU; 34; 1891-2020)
Pseudognaphalium viscosum (CIC-PYNF, ID, SRP, WCW, WTU; 7; 1938-2005)
Psilactis brevilingulata (ID; 1; 1951)
Psilocarphus brevissimus (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, NY, SRP, WS, WTU; 38; 1911-2019)
var. brevissimus (CIC, ID, SRP, WS, WTU; 22; 1911-2019)
Psilocarphus elatior (BBLM, CIC, ID, IDE, IDS, OSC, RM, SRP, WS, WTU; 43; 1898-2020)
Psilocarphus oregonus (BBLM, CIC, CRMO, ID, MONT, SRP, WS, WTU; 30; 1934-2014)
Psilocarphus tenellus (CIC, ID, SRP, WS, WTU; 10; 1913-2019)
Ptilocalais graciloba (ID; 1; 1932)
Pyrrhopappus carolinianus (CIC-PYNF; 1; 2000)
Pyrrhopappus grandiflorus (ID, WTU; 5; 2004-2009)
Pyrrocoma carthamoides (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SRP, UBC, VALE, WS, WTU; 116; 1890-2020)
var. carthamoides (CIC, ID, IDS, OSC, SRP, WS, WTU; 34; 1890-2017)
var. cusickii (BBLM, BBLM-OWY, CIC, CIC-SHO, CRMO, ID, IDS, OSC, RM, SRP, VALE, WS, WTU; 67; 1899-2020)
Pyrrocoma crocea (RM; 1; 1992)
var. crocea (RM; 1; 1992)
Pyrrocoma hirta (CIC, CIC-PYNF, ID, OSC, SRP, WS; 19; 1896-2006)
var. hirta (CIC, ID; 4; 1993-2001)
var. sonchifolia (CIC, ID, SRP, WS; 11; 1896-2006)
Pyrrocoma insecticruris (BBLM, CIC, CIC-SHO, CRMO, ID, RM, SRP, WTU; 29; 1953-2018)
Pyrrocoma integrifolia (CIC, ID, RM; 10; 1918-2020)
var. integrifolia (ID; 1; 1995)
Pyrrocoma lanceolata (BBLM, BOIS, CIC, CIC-SHO, ID, IDE, IDS, MONT, SRP, WS, WTU; 60; 1911-2015)
var. lanceolata (BBLM, CIC, ID, IDE, IDS, SRP, WS; 40; 1911-2015)
var. subviscosa (ID; 2; 1951-1961)
Pyrrocoma liatriformis (CIC, ID, IDS, NY, OSC, SRP, WS, WTU; 64; 1916-2005)
Pyrrocoma linearis (BBLM-OWY, CIC, ID, NY; 21; 1943-2018)
Pyrrocoma racemosa (ID, WTU; 7; 1937-2002)
var. paniculata (WTU; 2; 1951)
var. racemosa (ID; 1; 1953)
var. virgatus (ID; 2; 1937-1951)
Pyrrocoma radiata (BBLM, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDS, OSC, RM, SRP; 64; 1974-2005)
var. radiata (CIC-PYNF; 1; 1999)
Pyrrocoma rigida (NY, WS; 3; 1892)
Pyrrocoma scaberula (ID, NY, OSC, SRP, UBC, WS; 40; 1896-2009)
Pyrrocoma uniflora (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDS, MONT, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 154; 1911-2020)
var. howellii (OSC; 1; 1997)
var. linearis (ID, WTU; 2; 1940-1946)
var. uniflora (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, ID, IDS, RM, SRP, WS, WTU, WWB; 105; 1927-2020)
Ratibida columnifera (CIC, ID, IDS, SRP, WTU; 14; 1930-2015)
Rhaponticum repens (BBLM, BBLM-OWY, CIC, CIC-SHO, ID, IDE, IDS, NY, OSC, SRP, WS, WTU; 78; 1925-2011)
Rigiopappus leptocladus (BBLM, BBLM-OWY, CIC, CIC-SHO, ID, IDS, LEA, OSC, SRP, UBC, VALE, WS, WTU; 54; 1910-2018)
Rudbeckia hirta (CIC, ID, IDS, OSC, SRP, WS; 13; 1948-2016)
var. pulcherrima (ID; 3; 1976-1978)
Rudbeckia occidentalis (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, OSC, RM, SRP, UBC, WS, WTU, WWB; 281; 1891-2020)
Saussurea americana (BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, WCW, WS, WTU, WWB; 97; 1892-2020)
Senecio amplectens (CIC; 1; 1900)
Senecio atriapiculatus (ID; 1; 1914)
Senecio condensatus (ID; 2; 1944)
Senecio crassulus (BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 283; 1897-2020)
Senecio eremophilus (BOIS, ID; 2; 1976-1980)
Senecio fremontii (BOIS, CIC, CIC-PYNF, ID, IDS, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 144; 1895-2020)
ssp. fremontii (BOIS; 1; 1973)
var. fremontii (CIC, ID, NY, RM, SRP, WCW, WS; 32; 1897-2020)
Senecio hydrophiloides (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, ID, IDS, MONT, NY, OSC, RM, SRP, WS, WTU; 146; 1884-2020)
Senecio hydrophilus (BOIS, CIC, CIC-PYNF, ID, IDS, OSC, RM, SRP, WS, WTU; 102; 1891-2017)
Senecio inornatus (IDS, SRP; 4; 2010-2012)
Senecio integerrimus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, EWU, ID, IDE, IDS, LEA, MONT, NY, OSC, PSM, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 969; 1884-2020)
var. exaltatus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 606; 1884-2020)
var. integerrimus (CIC, ID, RM, SRP, WTU; 14; 1991-2018)
var. ochroleucus (BOIS, ID, IDE, WS, WTU; 26; 1923-2020)
Senecio lugens (ID, MONT, RM; 5; 1979-2015)
Senecio megacephalus (ID, IDS, OSC, SRP, WS, WTU; 22; 1895-2020)
Senecio pauperculus (CIC; 1; 1993)
var. thomsoniensis (CIC; 1; 1993)
Senecio pseudacorus (WS; 1; 1998)
Senecio serra (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, CRMO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SBLM, SRP, UBC, WS, WTU; 325; 1890-2019)
var. admirabilis (IDS; 1; 1937)
var. serra (CIC, CRMO, ID, IDS, MONT, NY, RM, SRP, WS; 92; 1896-2019)
Senecio sphaerocephalus (CIC, ID, IDS, LEA, RM, SRP, UBC, WS, WTU, WWB; 61; 1895-2017)
Senecio triangularis (BBLM-OWY, BOIS, CIC, CIC-PYNF, DPP, EWU, ID, IDS, MONT, OSC, RM, SBLM, SRP, WCW, WS, WTU; 442; 1884-2020)
var. triangularis (CIC-PYNF, ID, IDS, SRP; 49; 1974-2017)
Senecio utahensis (ID, WTU; 2; 1949-1956)
Senecio valerianella (NY, RM; 2; 1895)
Senecio viscosus (ID, WTU; 4; 1999-2019)
Senecio vulgaris (CIC, ID, IDE, IDS, MONT, OSC, RM, SRP, USFS, WS, WTU; 65; 1891-2019)
Solidago altissima (IDS, WS, WTU; 5; 1937-1983)
ssp. gilvocanescens (IDS, WS; 3; 1938-1983)
Solidago canadensis (BBLM, BOIS, CIC, CIC-PYNF, ID, IDE, IDS, LEA, OSC, SBLM, SRP, WCW, WS, WTU; 127; 1890-2016)
Solidago curtisii (WS; 1; 1968)
Solidago elongata (BBLM-OWY, IDS, MONT, WS, WTU; 81; 1896-2018)
Solidago gigantea (BBLM, BBLM-OWY, BOIS, CIC, ID, IDE, IDS, MONT, OSC, PSM, RM, SRP, WS, WTU; 107; 1890-2016)
Solidago lepida (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU; 260; 1895-2020)
ssp. fallax (IDS, WS; 3; 1941-1953)
var. lepida (BBLM-OWY, CIC, CIC-PYNF, ID, OSC, SRP, WTU; 25; 1972-2019)
var. salebrosa (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU; 220; 1895-2020)
Solidago missouriensis (BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 222; 1896-2017)
Solidago multiradiata (BBLM, BOIS, CIC, CIC-PYNF, ID, IDS, MONT, OSC, RM, SRP, WCW, WS, WTU, WWB; 315; 1895-2020)
Solidago nana (BOIS, CIC, ID, IDS, MONT, NY, RM, SRP, WS, WTU; 42; 1911-2013)
Solidago nemoralis (IDS, SRP; 2; 1930-2001)
ssp. decemflora (IDS; 1; 2001)
Solidago simplex (CIC, ID, IDS, SRP, WS; 13; 1939-2016)
var. nana (ID, IDS, WS; 7; 1939-2001)
var. simplex (CIC, ID, IDS, SRP; 5; 1939-2016)
Solidago spathulata (CIC, EWU, ID, OSC, SRP, WTU; 8; 1931-1992)
Solidago spectabilis (WTU; 1; 1964)
Solidago velutina (ID, IDS, OSC, RM, SRP, WS, WTU; 21; 1937-2003)
ssp. sparsiflora (ID, IDS, RM, WS; 7; 1937-1991)
Sonchus arvensis (BBLM-OWY, ID, IDE, IDS, NY, RM, SBLM, SRP, USFS, WS, WTU; 56; 1912-2008)
ssp. arvensis (NY, WS; 5; 1939-2003)
ssp. uliginosus (ID, IDS, RM, SBLM; 13; 1941-2005)
Sonchus asper (BBLM, BOIS, CIC, CRMO, ID, IDE, IDS, NY, OSC, RM, SRP, WS, WTU; 58; 1890-2012)
ssp. asper (ID; 1; 2012)
Sonchus oleraceus (BBLM, BOIS, CIC, ID, IDE, IDS, NY, SRP, WS; 33; 1917-2015)
Stenotus acaulis (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, EWU, ID, IDE, IDS, MONT, NY, OSC, RM, SRP, UBC, VALE, WS, WTU, WWB; 391; 1910-2020)
Stenotus caespitosus (WTU; 1; 1912)
Stenotus languinosus (ID; 28; 1940-2019)
var. andersonii (ID; 28; 1940-2019)
Stenotus lanuginosus (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, EWU, ID, IDS, MONT, NY, OSC, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 327; 1915-2020)
var. andersoni (V; 1; 1937)
var. andersonii (BOIS, CIC, EWU, ID, IDS, MONT, OSC, RM, SRP, UBC, V, WCW, WS, WTU, WWB; 155; 1929-2018)
var. lanuginosus (BBLM, BOIS, CIC, CIC-PYNF, ID, IDS, NY, OSC, RM, SRP, UBC, WS, WTU; 83; 1927-2019)
Stenotus latifolius (IDS; 4; 1931)
Stephanomeria exigua (BBLM, BBLM-OWY, BOIS, CIC, ID, IDS, OSC, SRP, WS, WTU; 41; 1911-2015)
ssp. exigua (OSC, WTU; 2; 1937-1952)
Stephanomeria paniculata (CIC, IDE, SRP, WS; 10; 1911-2013)
Stephanomeria tenuifolia (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDS, NY, OSC, RM, SRP, WS, WTU; 129; 1892-2016)
Stylocline psilocarphoides (CRMO; 2; 2002)
Symphyotrichum ascendens (BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDS, MONT, NY, OSC, RM, SRP, WCW, WS, WTU, WWB; 295; 1890-2019)
Symphyotrichum boreale (ID, IDS, MONT, SRP, WS; 21; 1933-2019)
Symphyotrichum bracteolatum (BBLM-OWY, BOIS, CIC, CRMO, EWU, ID, IDS, OSC, RM, SRP, UBC, WS, WTU, WWB; 166; 1890-2016)
Symphyotrichum campestre (BOIS, CIC, CRMO, ID, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 53; 1895-2019)
Symphyotrichum chilense (ID, IDS, SRP, WTU; 28; 1952-1994)
Symphyotrichum ciliatum (CIC, ID, IDS, WTU; 7; 1934-2001)
Symphyotrichum ciliolatum (ID; 5; 2002)
Symphyotrichum drummondii (BOIS; 1; 1975)
Symphyotrichum ericoides (BBLM, CIC, ID, IDS, SRP, WS, WTU; 27; 1912-2013)
var. ericoides (ID, IDS, WTU; 5; 1912-1944)
var. pansum (BBLM, CIC, ID, IDS, SRP, WS, WTU; 22; 1929-2013)
Symphyotrichum falcatum (ID, IDS, MONT, SRP; 6; 1933-2016)
Symphyotrichum foliaceum (BBLM-OWY, BOIS, CIC, CIC-PYNF, DPP, HPSU, ID, IDE, IDS, LEA, MONT, NY, OSC, RM, SRP, WS, WTU, WWB; 477; 1891-2020)
var. cusickii (ID; 1; 2016)
var. parryi (CIC, ID, IDS, OSC, RM, SRP, WS; 49; 1932-2014)
Symphyotrichum frondosum (BBLM, BBLM-OWY, CIC, ID, IDS, SRP; 20; 1914-2015)
Symphyotrichum jessicae (CIC, ID, NY, OSC, SRP, WS, WTU; 59; 1898-2006)
Symphyotrichum laeve (CIC, ID, IDS, OSC, SRP, WS, WTU; 63; 1890-2015)
var. geyeri (CIC, ID, IDS, WS, WTU; 21; 1926-1995)
var. purpuratum (SRP; 1; 1978)
Symphyotrichum lanceolatum (BBLM, CIC, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 113; 1897-2017)
var. hesperium (BBLM, CIC, ID, IDE, IDS, MONT, OSC, RM, SRP, WS, WTU, WWB; 110; 1897-2017)
Symphyotrichum lateriflorum (SRP; 1; 2012)
var. angustifolium (SRP; 1; 2012)
Symphyotrichum novae-angliae (SBLM; 1; 2019)
Symphyotrichum ontarionis (CIC; 1; 1987)
Symphyotrichum praealtum (IDS; 3; 1932-1935)
Symphyotrichum robynsianum (MONT; 1; 1911)
Symphyotrichum spathulatum (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CIC-SHO, ID, IDS, MONT, OSC, RM, SRP, WS, WTU; 243; 1890-2019)
Symphyotrichum subspicatum (CIC, ID, IDS, OSC, SRP, WS, WTU; 36; 1903-2020)
Tanacetum balsamita (CIC, ID, IDE, IDS, WS, WTU; 16; 1933-1986)
Tanacetum parthenium (CIC, CIC-PYNF, ID, IDE, RM, WTU; 13; 1912-2019)
Tanacetum vulgare (CIC, CIC-PYNF, CIC-SHO, CRMO, HPSU, ID, IDE, IDS, OSC, RM, SBLM, SRP, WCW, WS, WTU; 111; 1912-2020)
Taraxacum ceratophorum (ID, MONT, SRP, WTU; 11; 1937-2019)
Taraxacum erythrospermum (BOIS, CIC, CIC-SHO, CRMO, ID, MONT, RM, SRP, WS; 54; 1913-2018)
Taraxacum officinale (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, DPP, ID, IDE, IDS, MONT, NY, RM, SBLM, SRP, UBC, WS, WTU; 282; 1897-2020)
Taraxacum scopulorum (CIC, ID, WTU; 25; 1944-2018)
Tephroseris lindstroemii (ID; 1; 2003)
Tetradymia axillaris (CIC, ID; 3; 1956-2011)
var. longispina (CIC; 1; 2011)
Tetradymia canescens (BBLM, BBLM-OWY, BOIS, CIC, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, WS, WTU; 212; 1895-2019)
Tetradymia glabrata (BBLM, BOIS, CIC, ID, IDS, LEA, NY, OSC, RM, SBLM, SRP, WS, WTU; 120; 1911-2019)
f. calva (NY, RM, WTU; 9; 1912-1963)
Tetradymia spinosa (BBLM, BOIS, CIC, ID, IDE, IDS, MONT, OSC, SRP, WCW, WS, WTU; 83; 1899-2019)
Tetraneuris acaulis (ID, IDS, NY, SRP, WTU; 15; 1939-2003)
var. acaulis (NY; 2; 1982)
var. arizonica (IDS; 2; 1939-1941)
var. caespitosa (ID; 1; 2002)
Tetraneuris scaposa (CIC; 1; 2011)
var. scaposa (CIC; 1; 2011)
Tetraneuris torreyana (NY; 1; ?)
Thelesperma megapotamicum (IDS; 1; 2001)
Tonestus linearis (RM; 2; 1912)
Tonestus lyallii (CIC, ID, OSC, WS, WTU, WWB; 61; 1921-2020)
Townsendia condensata (CIC, ID, IDS, NY, SRP, WS, WTU; 34; 1939-2009)
Townsendia exscapa (CIC, IDS; 2; 1902-1941)
Townsendia florifer (BBLM, BOIS, CIC, CIC-SHO, CRMO, ID, IDE, IDS, MONT, NY, OSC, RM, SBLM, SRP, UBC, WCW, WS, WTU, WWB; 307; 1895-2019)
var. watsoni (WTU; 3; 1951)
Townsendia hookeri (BBLM, ID, RM; 4; 1978-1992)
Townsendia leptotes (CIC, ID, IDS, WTU; 25; 1938-2020)
Townsendia montana (BBLM, BOIS, CIC, ID, IDS, MONT, RM, SRP, UBC, WS, WTU, WWB; 72; 1897-2019)
Townsendia parryi (BOIS, CIC, ID, IDS, OSC, RM, SRP, UBC, WS, WTU, WWB; 127; 1895-2019)
Townsendia scapigera (CIC; 1; 2015)
Townsendia spathulata (IDS; 2; 1939)
Townsendia strigosa (ID; 1; 1948)
Townsendia watsonii (IDS; 1; 1935)
Tragopogon dibius × Tragopogon porrifolius (WS; 1; 1992)
Tragopogon dubius (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, CRMO, ID, IDE, IDS, MONT, NY, RM, SBLM, SRP, WCW, WS, WTU, WWB; 328; 1928-2020)
Tragopogon dubius × Tragopogon porrifolius (WTU; 1; 1949)
Tragopogon dubius × Tragopogon pratensis (WS, WTU; 5; 1949-1992)
Tragopogon dubius/pratensis (WS; 2; 1992)
Tragopogon floccosus (ID; 2; 2019)
Tragopogon mirus (ID, IDE, WS; 4; 1987-2006)
Tragopogon miscellus (ID, NY, SRP, WS; 14; 1949-2019)
Tragopogon porrifolius (BOIS, CIC, ID, IDE, IDS, SRP, WS, WTU; 31; 1910-2020)
Tragopogon porrifolius × Tragopogon pratensis (WS; 1; 1949)
Tragopogon pratensis (BBLM-OWY, BOIS, CIC, ID, IDE, IDS, RM, SRP, WS, WTU; 40; 1927-2019)
Triniteurybia aberrans (CIC, ID, IDS, NY, OSC, RM, SRP, WS; 16; 1910-2013)
Tripleurospermum inodorum (CRMO, ID, IDE, IDS, OSC, RM, SRP, WS; 24; 1911-2016)
Tripleurospermum maritima (ID; 1; 1992)
ssp. maritima (ID; 1; 1992)
Tripleurospermum maritimum (CIC, ID, IDE, IDS, RM, SRP, WTU; 50; 1939-2020)
ssp. maritimum (IDE, IDS, RM, SRP, WTU; 34; 1939-2020)
Troximon purpureum (WTU; 1; 1910)
Tussilago farfara (WTU; 1; 2005)
Uropappus lindleyi (BBLM, CIC, SRP, WS, WTU; 5; 1892-2016)
Wyethia amplexicaulis (BBLM, BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, PSM, RM, SRP, WCW, WS, WTU, WWB; 229; 1895-2020)
Wyethia amplexicaulis < Wyethia helianthoides (WTU; 2; 1936-1939)
Wyethia amplexicaulis > Wyethia helianthoides (WTU; 4; 1936-1939)
Wyethia amplexicaulis × Wyethia helianthoides (ID, IDS, WTU; 8; 1938-1995)
Wyethia angustifolia (SRP; 1; 1913)
Wyethia ×cusickii (BBLM, ID; 2; 1983-1992)
Wyethia helenioides (BBLM-OWY, CIC, SRP, WS; 5; 1911-2008)
Wyethia helianthoides (BBLM, BBLM-OWY, BOIS, CIC, CIC-PYNF, DPP, ID, IDS, MONT, OSC, RM, SRP, UBC, WCW, WS, WTU, WWB; 241; 1911-2019)
Wyethia robusta (SRP; 1; 1955)
Xanthisma grindelioides (ID, IDS; 2; 2003-2005)
Xanthisma spinulosum (NY; 1; 1892)
var. spinulosum (NY; 1; 1892)
Xanthium affine (ID; 1; 1929)
Xanthium spinosum (CIC, ID, IDE, IDS, WS, WTU; 18; 1931-1988)
Xanthium strumarium (BBLM-OWY, BOIS, CIC, CRMO, ID, IDE, IDS, MONT, OSC, SRP, WS, WTU; 92; 1910-2020)
Youngia stebbinsiana (WS; 1; 1944)