Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Bidens

View taxon page for Bidens

(For a list of species in Bidens, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Leaf 

2' Leaf 

3. Fruit with ± thickened margin, prominently ribbed tips yellow; ray 0 or < 15 mm ..... B. cernua

3' Fruit without thick margin or prominent ribs; palea tips ± red; ray 15–30 mm ..... B. laevis

1' Leaf 

4. Fruit narrowly  or slightly , 4-angled ..... B. pilosa

4' Fruit wedge-shaped, flat

5. Outer phyllaries 5–8; inner phyllaries = disk ..... B. frondosa

5' Outer phyllaries 10–16; inner phyllaries < disk ..... B. vulgata


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .

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