| 词条 | Erigeron tweedyi |
| 释义 |
|image=Erigeron tweedyi (5061043079).jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Astereae |genus = Erigeron |species = E. tweedyi |binomial = Erigeron tweedyi |binomial_authority = Canby 1888 }}Erigeron tweedyi is a North American species of flowering plant in the daisy family known by the common name Tweedy’s fleabane.[1] It is native to the northern Rocky Mountains in the US states of Montana, Idaho, and Wyoming.[1]Erigeron tweedyi grows on talus and rocky slopes at high elevations. It is a perennial herb up to 20 centimeters (8 inches) tall, producing a taproot and a branching underground caudex. Leaves are covered with grayish-white hairs. The inflorescence is made up of 1-4 flower heads per stem. Each head contains 20–50 white, blue, or purple ray florets surrounding numerous yellow disc florets.[2] References1. ^Biota of North America Program 2014 county distribution map {{Taxonbar|from=Q19848805}}{{Astereae-stub}}2. ^1 Flora of North America Erigeron tweedyi Canby, 1888. Tweedy’s fleabane 3 : Erigeron|Flora of the Western United States|Plants described in 1888 |
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