Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

    THIS PAGE IS NO LONGER UPDATED
    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 ALOPECURUS

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

  1. Spikelets except awns > 4 mm
 
    2. Perennial; stem generally > 4.5 dm; glumes, lemma acute
A. pratensis
    2' Annual; stem generally < 4.5 dm; glumes, lemma acute or obtuse
 
      3. Glumes ciliate on keel near base, glabrous on lateral veins, winged and appearing asymmetrical; anthers > 3.5 mm; inflorescence generally > 7 cm, tapered at both ends; leaf sheaths not inflated
A. myosuroides
      3' Glumes ciliate on all nerves, not winged; anthers < 1.5 mm; inflorescence < 6.5 cm, not tapered; upper leaf sheaths conspicuously inflated
2 A. saccatus
  1' Spikelets except awns < 4 mm
 
    4. Awn straight, > lemma by 0–2 mm; perennial herb
A. aequalis
    4' Awn bent, exceeding lemma by 1.5–5 mm; perennial herb or annual
 
      5. Spikelets > 3 mm; upper leaf sheath conspicuously inflated; awn exceeding lemma by 3–5 mm
2 A. saccatus
      5' Spikelets generally < 3 mm; upper leaf sheath not inflated; awn exceeding lemma by 1.5–3.5 mm
 
        6. Annual; anther < 1 mm
A. carolinianus
        6' Perennial; anther 1.2–2 mm
A. geniculatus


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