| 词条 | Helianthus agrestis |
| 释义 |
|image = |status = G5 |status_system = TNC |regnum = Plantae |unranked_divisio = Angiosperms |unranked_classis = Eudicots |unranked_ordo = Asterids |ordo = Asterales |familia = Asteraceae |genus = Helianthus |species = H. agrestis |binomial = Helianthus agrestis |binomial_authority = Pollard }}Helianthus agrestis is a species of sunflower known by the common name Southeastern sunflower. It is found only in the states of Florida and Georgia in the southeastern United States.[1][2]Helianthus agrestis is an annual herb sometimes as much as 200 cm (80 inches) tall. One plant can have as many as 15 flower heads, each with about 12 ray florets surrounding 50 or more disc florets. It grows in wet soil in marshes and pine flatwoods at elevations less than 50 meters (170 feet) elevation.[3][4] References1. ^Biota of North America Program 2014 county distribution map 2. ^Atlas of Florida Vascular Plants 3. ^Flora of North America, Helianthus agrestis Pollard, 1900. Southeastern sunflower 4. ^[https://www.biodiversitylibrary.org/page/2308249#page/220/mode/1up Pollard, Charles Louis 1900. Proceedings of the Biological Society of Washington 13(38): 184] External links{{Taxonbar|from=Q15488027}}{{Heliantheae-stub}} 3 : Helianthus|Flora of the Southeastern United States|Plants described in 1753 |
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