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    THIS PAGE IS NO LONGER UPDATED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 ERAGROSTIS

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

  1. Perennial; anthers 0.5–1+ mm; spikelet axis breaking tardily above glumes and between florets
 
    2. Stems simple, erect, not weak or trailing; spikelets 1.5–2 mm wide; fruit > 1 mm
E. curvula var. curvula
    2' Stems abruptly bent, branching, some becoming decumbent and rooting at nodes; spikelets ± 1 mm wide; fruit generally < 0.8 mm
E. lehmanniana
  1' Annual; anthers generally 0.2–0.4 mm; spikelet axis not breaking apart, persistent, glumes and lemmas deciduous, paleas deciduous or remaining attached
 
    3. Stems widely creeping, rooting at nodes, forming mats
E. hypnoides
    3' Stems often decumbent, not creeping, not mat-forming
 
      4. Fruit with one or both ends truncate; surface checkered, with an evident groove on side opposite embryo
E. mexicana
        5. Spikelet ovoid to oblong, 1.5 mm + wide; fruit ± rectangular; inflorescence branches often with scattered glands
subsp. mexicana
        5' Spikelet linear to linear-lanceolate, ± 1 mm wide; fruit pear-shaped; inflorescence not glandular
subsp. virescens
      4' Fruit elliptic, ovate, or sometimes ± spheric, tip rounded; surface smooth, not grooved
 
        6. Plants without conspicuous glands or glandular areas
 
          7. Paleas deciduous; lower glume < 1/2 length of lowest floret; lowest inflorescence branches generally whorled
E. pilosa var. pilosa
          7' Paleas persistent; lower glume > 1/2 length of lowest floret; inflorescence branches generally solitary or paired
E. pectinacea
            8. Spikelet stalks spreading
var. miserrima
            8' Spikelet stalks appressed to branches, diverging < 20°
var. pectinacea
        6' Plants with conspicuous glands or glandular areas on leaf sheaths, blade margins, inflorescence axis and branches, spikelet stalks, or lemma keel
 
          9. Leaf blade margin with conspicuous glands; glume keel, lemmas, other plant parts also often glandular
 
            10. Spikelets 2.5–3 mm wide; spikelet stalk generally not glandular
E. cilianensis
            10' Spikelets < 2 mm wide; spikelet stalks generally with 1 or 2 glands
E. minor
          9' Leaf blade margin without glands; glume keel and lemmas not glandular
 
            11. Inflorescence axis with conspicuous glandular bands or patches especially below lowest branches; leaves without glands
E. barrelieri
            11' Inflorescence axis without conspicuous glandular bands or patches, sometimes glandular below stem nodes; leaf sheath, blade with many circular glands
E. lutescens


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