Jepson eFlora
Key to families | Table of families and genera

Key to Echinochloa

View taxon page for Echinochloa

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

1. Lower lemma generally unawned; spikelets, especially those near the base of inflorescence, not breaking free at maturity; upper lemma > upper glume in length, width ..... [E. esculenta]

1' Lower lemma often awned; spikelets breaking free at maturity; upper lemma < to ± > upper glume in length, width

2. Stem erect, densely tufted; spikelets 3.7–7 mm; plants resembling rice vegetatively, closely associated with rice cultivation ..... E. oryzoides

2' Stem sprawling, decumbent or erect; spikelets 2–5 mm; plant occasionally resembling rice vegetatively but, if so, the spikelets < 3 mm; plants generally not associated with rice cultivated, in wet, disturbed places and cultivated fields

3. Inflorescence branches 0.7–2(4) cm, without 2° branches; spikelet 2–3 mm, unawned ..... E. colona

3' Inflorescence branches 1–14 cm, generally rebranched, 2° branches often short and inconspicuous; spikelet 2.5–5 mm, awned or not

4. Upper lemma broadly obovate, acute or acuminate, tip not sharply differentiated, not early withering; inflorescence generally erect, branches generally spreading ..... E. muricata var. microstachya

4' Upper lemma narrowly elliptic to broadly ovate, acute or obtuse, tip withering, differentiated from lemma body by a line of minute hairs or not; inflorescence erect to strongly drooping

5. Inflorescence spreading to erect, occasionally nodding, not drooping 180°, 2° branches generally inconspicuous; awns straight or irregularly bent, <= 10 mm and only at branch tips or <= 50 mm and throughout inflorescence ..... E. crus-galli

5' Inflorescence generally drooping 180°, 2° branches to 3 cm; awns curved, 3–15 mm, throughout inflorescence ..... E. crus-pavonis var. crus-pavonis

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