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Erigeron bellidiastrum : ウィキペディア英語版 | Erigeron bellidiastrum
''Erigeron bellidiastrum'' (western daisy fleabane or sand fleabane) is a species of ''fleabane'' in the daisy family. It is native to northern Mexico (State of Chihuahua) and the western and central United States (western Great Plains and open sandy areas in the deserts west of the Rockies).〔(Biota of North America Program 2014 county distribution map )〕 ''Erigeron bellidiastrum'' is an annual or biennial herb up to 50 cm (20 inches) tall, with a taproot. It produces flower heads in groups of 1-12 on the ends of branches. Each head can have up to 70 white ray florets surrounding many small disc florets.〔(Flora of North America, ''Erigeron bellidiastrum'' Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 307. 1840. Sand fleabane )〕 ;Varieties〔(The Plant List, ''Erigeron bellidiastrum'' Nutt. )〕〔 *''Erigeron bellidiastrum'' var. ''arenarius'' (Greene) G.L.Nesom - New Mexico, Texas, Chihuahua). *''Erigeron bellidiastrum'' var. ''bellidiastrum'' - Arizona, Colorado, Kansas, Montana, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, Utah, Wyoming *''Erigeron bellidiastrum'' var. ''robustus'' Cronquist - Colorado, Kansas, Nebraska, New Mexico, Oklahoma, Texas ==References==
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