| 词条 | Vernonia gigantea |
| 释义 |
|image = Vernonia gigantea 25.jpg |image_caption = Tall ironweed near Cincinnati, Ohio |genus = Vernonia |species = gigantea |authority = (Walter) Trel. }}Vernonia gigantea (also known as giant ironweed,[1] tall ironweed[1] or ironweed[2]) is a species of perennial plant from Asteraceae family that can be found in United States and Canada.[3] The plant is native to the eastern United States, north to New York state and Ontario, and southwest to Texas.[3] DescriptionThe seeds are wind-dispersed. The plant is self-incompatible and exhibits substantial ecotypic variation, a factor which may explain their broad geographic distribution.[5] {{clearleft}}References1. ^Common names 2. ^1 2 {{cite web|url=http://www.goodnessgrows.com/id367.html|title=Vernonia gigantea - Ironweed|publisher=Goodness Grows|accessdate=September 7, 2012}} 3. ^1 2 {{cite web|url= http://plants.usda.gov/java/profile?symbol=VEGI|title=Vernonia gigantea |publisher=PLANTS Profile|work=USDA|accessdate=September 7, 2012}} 4. ^1 {{cite web|url= http://www.illinoiswildflowers.info/savanna/plants/tl_ironweed.htm|title=Tall Ironweed|publisher=Illinois Wild Flowers|accessdate=September 7, 2012}} 5. ^{{cite web|first=Lowell|last=Urbatsch|url=http://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1396&context=tnas|title=A Study Of Ecotypes In Vernonia Gigantea Gigantea (Compositae)|publisher=Transactions of the Nebraska Academy of Sciences and Affiliated Societies|page=188|year=1973|access-date=10 October 2015}} External links
2 : Vernonia|Flora of North America |
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