Agoseris

Agoseris is a small genus of annual or perennial herbs in the Asteraceae or sunflower family described as a genus in 1817.[1][2]

Mountain dandelion
Agoseris monticola
Scientific classification
Kingdom:
Plantae
(unranked):
Angiosperms
(unranked):
Eudicots
(unranked):
Asterids
Order:
Asterales
Family:
Asteraceae
Subfamily:
Cichorioideae
Tribe:
Cichorieae
Subtribe:
Microseridinae
Genus:
Agoseris

Synonyms

Agoseris is native to North America, South America and the Falkland Islands.[3][4]

In general appearance, Agoseris is reminiscent of dandelions and are sometimes called mountain dandelion or false dandelion. Like dandelions the plants are (mostly) stemless, the leaves forming a basal rosette, contain milky sap, produce several unbranched, stem-like flower stalks (peduncles), each flower stalk bearing a single, erect, liguliferous flower head that contains several florets, and the flower head maturing into a ball-like seed head of beaked achenes, each achene with a pappus of numerous, white bristles.

Species
Accepted species[5][6][4]
Hybrids[5]
  • Agoseris × agrestis (A. glauca × A. parviflora) - Front Range agoseris - UT CO
  • Agoseris × dasycarpa (A. glauca × A. monticola) - Modoc agoseris - CA OR
  • Agoseris × elata (A. aurantiaca × A. grandiflora) - Willamette agoseris - CA OR WA BC
Species formerly included[5]

Distribution

Agoseris is one of several groups of flowering plants that have a New World amphitropical distribution (occurring in temperate regions of both North and South America). Most species are found in cordilleran regions of western North America, being distributed from southern Yukon Territory and the panhandle of Alaska southward to northern Baja California, Arizona, and New Mexico, and from the Pacific coast eastward to the northern Great Plains. Disjunct, isolated populations occur on the Gaspe Peninsula and Otish Mountains (Monts Otish) of Quebec, near the Hudson Bay in Ontario, and on hills near the Arctic Ocean in the Northwest Territories of Canada. One species is native to the southern Andes Mountains of Argentina and Chile, southward to Patagonia, Tierra del Fuego, and the Falkland Islands.

References
  1. Rafinesque, Constantine Samuel. 1817. Florula Ludoviciana 58.
  2. Tropicos, Agoseris Raf.
  3. Flora of North America Mountain- or false dandelion Agoseris Rafinesque, Fl. Ludov. 58. 1817.
  4. Flann, C (ed) 2009+ Global Compositae Checklist
  5. The Plant List search for Agoseris
  6. Biota of North America Program 2013 county distribution maps


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