Copy permalink to share
Asteraceae
Bidens

not marked as a favorite taxon Bidens Linnaeus. Common name: Beggar-ticks, Bur-marigold, Spanish-Needles.

Key to Bidens

A genus of about 240 species, herbs, cosmopolitan. Recent molecular studies suggest that the relationship between Bidens and Coreopsis is complex, and that changes in taxonomy will be needed to more accurately reflect relationships (Kim et al. 1999; Crawford & Mort 2005).

Glossary (beta!)

ID notes: The involucre of phyllaries is subtended by an additional series of bracteal structures, the calyculus. Other, related genera have this feature as well.

References: Ballard (1986); Cronquist (1980); Lipscomb & Smith (1977); Lizarazu et al. (2024); Roberts (1985); Sherff & Alexander (1955); Strother & Weedon (2006) In Flora of North America Editorial Committee (2006c). Show full citations.

Show in key(s)

Show parent family | Show parent in key(s)

Show species in Bidens

Your browser does not support SVGs

Hover over a shape, letter, icon, or arrow on the map for definition or see the legend. Data for arrows not developed for genera and families which may have species only occurring outside the flora area.

image #1 of Bidens© Gary P. Fleming | Bidens trichosperma | Original Image ⭷
image #2 of Bidens© Floyd A. Griffith | Bidens mitis | Original Image ⭷
image #3 of Bidens© John Gwaltney | Bidens bipinnata
image #4 of Bidens© Gary P. Fleming | Bidens laevis | Original Image ⭷
image #5 of Bidens© Gary P. Fleming | Bidens discoidea | Original Image ⭷
image #6 of Bidens© Alan M. Cressler | Bidens frondosa | Original Image ⭷
image #7 of Bidens© Richard & Teresa Ware | Bidens alba var. radiata CC-BY-NC, permission granted to NCBG | Original Image ⭷
image #8 of Bidens© Scott Ward | Bidens bipinnata | Original Image ⭷

Feedback

See something missing or incorrect about Bidens? Let us know here:
  1. Please include your name and if possible, email in case when need to clarify what you wrote.
  2. If you opt out of including email, please be as specific as possible (e.g., which photo is incorrect?)
  3. Please do not submit questions asking to identify plants or about horticultural topics (e.g., how do I control an invasive plant in my garden?). Instead, those questions can be submitted here for the Carolinas region only.
  4. Please do not send us feedback about unkeyed species as this work is ongoing.
  5. Please allow time for flora edits to show in our next data release. We greatly appreciate your feedback but may require extra time to research complicated taxonomic issues.

« show previous | back to original search ↑ | show next »