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''Agoseris'' is a small genus of annual or perennial herbs in the Asteraceae or sunflower family described as a genus in 1817.〔Rafinesque, Constantine Samuel. 1817. Florula Ludoviciana 58.〕〔(Tropicos, ''Agoseris'' Raf. )〕 ''Agoseris'' is native to North America, South America and the Falkland Islands.〔(Flora of North America Mountain- or false dandelion ''Agoseris'' Rafinesque, Fl. Ludov. 58. 1817. )〕〔 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〔(The Plant List search for ''Agoseris'' )〕〔(Biota of North America Program 2013 county distribution maps )〕〔(Flann, C (ed) 2009+ Global Compositae Checklist )〕 # ''Agoseris apargioides'' - seaside agoseris - CA OR WA # ''Agoseris aurantiaca'' - orange agoseris - USA and Canada from Rocky Mountains to Pacific; also Quebec # ''Agoseris chilensis'' - Chile # ''Agoseris coronopifolia'' - Patagonian agoseris - Chile, Argentina, Falkland Islands # ''Agoseris glauca'' - prairie agoseris - western USA + Canada from AK to Ont + NM # ''Agoseris grandiflora'' - grassland agoseris - CA OR WA ID NV MT UT BC # ''Agoseris heterophylla'' - annual agoseris - western USA + Canada + northwestern Mexico # ''Agoseris hirsuta'' - Coast Range agoseris - CA # ''Agoseris laevigata'' - Chile # ''Agoseris × montana'' - North Park agoseris - CO WY # ''Agoseris monticola'' - Sierra Nevada agoseris - CA OR WA ID NV BC # ''Agoseris parviflora'' - steppe agoseris - western USA # ''Agoseris pterocarpa'' - Argentina # ''Agoseris retrorsa'' - spearleaf agoseris - CA OR WA NV UT ;Hybrids〔 *''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〔 *''Agoseris alpestris'' = ''Nothocalais alpestris'' *''Agoseris barbellulata'' = ''Nothocalais alpestris'' *''Agoseris cuspidata'' = ''Nothocalais cuspidata'' 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Agoseris」の詳細全文を読む スポンサード リンク
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