Bidens vulgata
| Bidens vulgata | |
|---|---|
 | |
| achenes | |
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Bidens |
| Species: | B. vulgata |
| Binomial name | |
| Bidens vulgata Greene | |
| Synonyms | |
|
Bidens puberula | |
Bidens vulgata is a species of flowering plant in the daisy family known by the common name big devils beggartick. It is native to eastern North America, where it is a plant of wetlands. It is an introduced species in much of western North America as well as parts of Europe. This is an annual herb producing a hairy stem which generally grows 30 to 50 centimeters tall but often grows much taller, exceeding one meter. The leaves are made up of several lance-shaped leaflets each up to 8 centimeters long. The inflorescence produces small flower heads with centers of yellow disc florets and a fringe of 3 to 5 yellow ray florets a few millimeters in length. Some heads lack ray florets. The fruit is a flattened achene with two sharp barbs at one end.