The Jepson Manual: Higher Plants of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to BIDENS

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Leaves simple
 
    2. Leaves petioled
B. tripartita
    2' Leaves sessile
 
      3. Fruit with ± thickened margin, prominently ribbed; tips of chaff scales yellow; ligules 0 or < 15 mm
B. cernua var. cernua
      3' Fruit flat, without thick margin or prominent ribs; tips of chaff scales reddish; ligules 15–30 mm
B. laevis
  1' Leaves pinnately compound
 
    4. Fruit narrow, ± cylindric
B. pilosa var. pilosa
    4' Fruit wedge-shaped, flat
 
      5. Outer phyllaries 5–8; inner phyllaries = disk; fruit ± black
B. frondosa
      5' Outer phyllaries 10–16; inner phyllaries < disk; fruit brown or dark green
B. vulgata


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