| Bidens leptocephala | |
|---|---|
| Conservation status | |
 Secure (NatureServe) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Bidens |
| Species: | B. leptocephala |
| Binomial name | |
| Bidens leptocephala Sherff | |
| Synonyms | |
| |
Bidens leptocephala, commonly known as the fewflower beggarticks, is an annual herbaceous flowering plant in the Asteraceae family. It is native to the southwestern United States (Arizona, New Mexico, western Texas) and northern Mexico (Chihuahua, Sonora, Baja California, Baja California Sur).
Description
Bidens leptocephala is an annual herb that typically grows between 10 to 50 cm (3.9 to 19.7 in) tall. The opposite leaf blades are 2 to 10 cm (0.79 to 3.94 in) long by 1 to 6 cm (0.39 to 2.36 in) wide. They are pinnately divided up to 2 times into linear segments. The leaf petioles are up to 4 cm in length. Flower heads are sometimes borne one at a time or in groups of 2 or 3, each head with whitish or yellowish disc florets and sometimes with up to 3 pale yellow ray florets.
The species mainly flowers in September.
Distribution and habitat
Bidens leptocephala has been found in the United States (Arizona, New Mexico, Texas) and in Mexico (Baja California, Chihuahua). It grows along streams at elevations of 900–1800 metres from sea level.
Conservation
As of November 2024, Bidens leptocephala is listed on NatureServe as Secure (G5) worldwide.
Taxonomy
Bidens leptocephala was first named by Earl Edward Sherff and described in 1917 in Bot. Gaz. 64: 22.
References
- ^ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 2024-11-30.
- ^ "Bidens leptocephala Sherff | Plants of the World Online | Kew Science". Plants of the World Online. Retrieved 2024-11-30.
- NRCS. "Bidens leptocephala". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 29 May 2015.
- Sherff, Earl Edward 1917. Botanical Gazette 64(1): 22–23. description in Latin, commentary in English
- ^ "Bidens leptocephala - FNA". floranorthamerica.org. Retrieved 2024-11-30.
- SEINet, Southwestern Biodiversity, Arizona Chapter, Bidens leptocephala Sherff description, photos, distribution map
- Biota of North America Program 2014 county distribution map
External links
Media related to Bidens leptocephala at Wikimedia Commons