| 词条 | Erigeron vernus |
| 释义 |
|image = Erigeron vernus.jpg |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |tribus = Astereae |genus = Erigeron |species = E. vernus |binomial = Erigeron vernus |binomial_authority =S.L.Welsh & Goodrich 1983 |synonyms_ref=[1][2] |synonyms={{collapsible list|bullets = true |title=Synonymy |Erigeron vernum (L.) Torr. & A.Gray |Aster vernus L. |Doronicum laevifolium Walter |Erigeron integrifolius Bertol. |Fragmosa nudicaulis (Michx.) Raf. ex B.D.Jacks. |Stenactis verna (L.) Nees }}}} Erigeron vernus is a North American species of flowering plant in the daisy family known by the common name early white-top fleabane.[3] It is native to the southeastern United States from Virginia to Louisiana.[3]Erigeron vernus grows in moist locations in flatwoods and savannahs, and sometimes in ditches and by roadsides. It is a biennial or perennial herb up to 50 centimeters (20 inches) tall, producing rhizomes and a woody underground caudex. The inflorescence is made up of 1–25 flower heads in flat-topped arrays. Each head contains 25–40 white ray florets surrounding numerous yellow disc florets.[4][5]References1. ^Tropicos, Erigeron vernus (L.) Torr. & A. Gray {{Taxonbar|from=Q15597969}}{{Astereae-stub}}2. ^The Plant List, Erigeron vernus (L.) Torr. & A.Gray 3. ^Biota of North America Program 2014 county distribution map 4. ^1 Flora of North America, Erigeron vernus (Linnaeus) Torrey & A. Gray, 1841. Early white-top fleabane 5. ^Godfrey, R. K. & J. W. Wooten. 1981. Aquatic and Wetland Plants of Southeastern United States Dicotyledons 1–944. Univ. Georgia Press, Athens. 3 : Erigeron|Flora of the Southeastern United States|Plants described in 1753 |
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