The Jepson Manual: Higher Plants of California

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    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to ORCUTTIA

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

  1. Lemma teeth unequal, central tooth generally longest
 
    2. Lemma 6–7 mm, teeth awned, awns > 1 mm; fruit ± 2.5 mm
O. viscida
    2' Lemma < 5 mm, teeth sharp-pointed or awned, awns < 0.5 mm; fruit < 2 mm
 
      3. Plant sparsely hairy; stem generally prostrate; inflorescence with spikelets well separated on axis below, crowded toward tip; Southwestern California
O. californica
      3' Plant conspicuously hairy, grayish; stem erect or ± decumbent; spikelets crowded, inflorescence ± head-like; San Joaquin Valley
O. inaequalis
  1' Lemma teeth ± equal
 
    4. Stem generally prostrate; fruit 1.5–2 mm
O. californica
    4' Stem erect, ascending, or decumbent; fruit 2.5–3 mm
 
      5. Stem branching only at lower nodes; inflorescence with upper spikelets densely crowded, lower well separated; plant generally densely hairy
O. pilosa
      5' Stem ± slender, often branching from upper nodes; spikelets evenly spaced, not densely crowded; plant sparsely hairy
O. tenuis


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