Jepson eFlora: Key page
Vascular Plants of California
Key to families | Table of families and genera

Key to Eragrostis

View taxon page for Eragrostis

(For a list of species in Eragrostis, use the above link.)

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Perennial herb axis breaking tardily above glumes and between 

2. Leaf  12–50 (65) cm; spikelet 1.5–2 mm wide;  1.8–3 mm; fruit ± 1.5 mm ..... E. curvula

2' Leaf blade 2–12 cm; spikelet 0.8–1.2 mm wide; lemma 1.4–1.7 mm; fruit 0.6–0.8 mm ..... E. lehmanniana

1' Annual; spikelet axis persistent, glumes and  falling from axis, paleae generally persistent

3. Plants mat-forming;  portion of stem , rooting at  ..... E. hypnoides

3' Plants generally not mat-forming; basal portion of stem , not rooting at nodes

4. Fruit with 1 or both ends ; surface checkered, with an evident groove on 1 side ..... E. mexicana

5. Spikelet  to , 1.5+ mm wide; inflorescence branches often with scattered glands ..... subsp. mexicana

5' Spikelet  to lance-linear, ± 1 mm wide; inflorescence not glandular ..... subsp. virescens

4' Fruit variously-shaped, tip rounded; surface smooth, not grooved

6. Plant without conspicuous glands or glandular areas (rarely so in Eragrostis pilosa)

7. Palea deciduous; lower  < 1/2 lowest floret; lowest inflorescence branches  ..... E. pilosa var. pilosa

7' Palea persistent; lower glume > 1/2 lowest floret; inflorescence branches  or  ..... E. pectinacea

8. Spikelet stalks  ..... var. miserrima

8' Spikelet stalks  to branches, diverging < 20° ..... var. pectinacea

6' Plant with conspicuous glands or glandular areas on  , blade margin, inflorescence axis and branches, spikelet stalk, or lemma keel

9. Inflorescence contracted, 0.5–2 cm wide, 1° branches generally  to appressed;  light yellow ..... E. lutescens

9' Inflorescence open to contracted, 2–18 cm wide, 1° branches diverging; spikelets ± green, red-purple, or lead-colored

10. Spikelets 2–4 mm wide; glume and lemma keels glandular; anthers yellow ..... E. cilianensis

10' Spikelets 1.1–2.2 mm wide; glume and lemma keels not glandular; anthers red-brown

11. Anthers 2; spikelet stalks generally with a distal ring of cup-shaped glands; lemma keels sometimes glandular ..... E. minor

11' Anthers 3; spikelet stalks without a distal ring of cup-shaped glands; lemma keels not glandular ..... E. barrelieri


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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, [accessed on ]

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

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