| 词条 | Iva microcephala |
| 释义 |
|image = |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |genus = Iva |species = I. microcephala |binomial = Iva microcephala |binomial_authority =Nutt. 1840 |}}Iva microcephala, the piedmont marsh elder,[1] is a North American species of flowering plants in the daisy family. It grows in the southeastern United States in Alabama, Florida, Georgia, and the Carolinas.[2]Iva microcephala is a wind-pollinated annual herb sometimes as much as 100 cm (40 inches) in height. Leaves are very narrow, sometimes thread-like, up to 6 cm (2.4 inches) long. Flower heads are small, clustered in elongated arrays at the tips of branches, each head containing only about 5-8 flowers.[3] References1. ^{{PLANTS|id=IVMI|taxon=Iva microcephala|accessdate=7 August 2015}} {{Taxonbar|from=Q15596210}}{{Heliantheae-stub}}2. ^Biota of North America Program 2014 county distribution map 3. ^Flora of North America, Iva microcephala Nuttall 1840 3 : Heliantheae|Flora of the Southeastern United States|Plants described in 1840 |
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