big-flowered agoseris
Agoseris grandiflora (Nutt.) Greene
Agoseris grandiflora, known as big-flowered agoseris, is a flowering plant in the Asteraceae family. It is native to regions in North America, including British Columbia, California, and parts of the western United States and Mexico. The plant features rosette leaves that are linear or obovate, and a flowering stem with heads containing 40-500 ligulate flowers. Its achenes are fusiform, with a beak three to four times the length of the corpus. The species was first described in 1891.
Description
Agoseris grandiflora is an herb with a single flowering stem. Rosette leaves are 10.0-50.0 cm long, with entire to pinnatifid margins and a petiole-like base. The peduncle ranges from 15.0-96.0 cm in length and is often covered with bracts. The involucre is hemispherical to campanulate, with narrowly ovate bracts that may be green or purple. Corollas are ligulate, and achenes are ribbed and glabrous. The pappus is 7.0-15.0 mm long. This species is found in grasslands and similar habitats across its native range.
Other common names
Puget sound agoserisgrassland agoserisbig-flowered agoserislarge-flowered agoserislarge-flowered false-dandelionlarge-flowered goat-chicorybigflower agoseris
Distribution
British Columbia · California · Montana · Nevada · Idaho · Washington · Oregon · Utah · Mexico Northwest
Synonyms
Troximon plebeiumTroximon grandiflorumTroximon marshalliiStylopappus grandiflorusMacrorhynchus grandiflorusAgoseris intermediaAgoseris grandiflora var. intermediaAgoseris cinereaAgoseris plebeiaAgoseris grandiflora var. leptophyllaTroximon grandiflorum var. obtusifoliumTroximon grandiflorum var. grandiflorumAgoseris obtusifoliaAgoseris marshallii
