Jepson eFlora
Key to families | Table of families and genera

Key to Bidens

View taxon page for Bidens

1. Leaf simple

2. Leaf petioled ..... B. tripartita

2' Leaf sessile

3. Fruit with ± thickened margin, prominently ribbed; palea 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 pinnate

4. Fruit narrowly cylindric or slightly compressed, 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


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