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Flaveria trinervia
Also called Speedyweed, Yellow Twinstem
Flaveria trinervia is a species of flowering plant in the family Asteraceae known by the common names clustered yellowtops, speedyweed, and yellow twinstem. It is native to parts of the Americas, including the southeastern and southwestern United States (Florida, Texas, Arizona, New Mexico), most of the Bahamas, Mexico, Belize, and parts of the Caribbean, especially Cuba, Cayman Islands, Jamaica, Hispaniola, Puerto Rico and Barbados. It is also known in many other places as an introduced species and often a noxious weed, such as in Hawaii.
Flaveria trinervia grows easily in many types of wet habitats, including saline and alkaline soils and highly disturbed habitat. This is an annual herb growing erect and known to exceed two meters (7 feet) in height.
Flaveria angustifolia · Flaveria anomala · Clustered Yellowtops · Coastal plain yellowtops · Brown's yellowtops · Alkali yellowtops · Clasping yellowtops · Flaveria cronquistii · Florida yellowtops · Flaveria kochiana · Narrowleaf yellowtops · Grand Canyon Flaveria
Text excerpted from the Wikipedia article Flaveria trinervia by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
