Pleuropogon californicus |
Pleuropogon |
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semaphoregrass |
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Habit | Plants perennial or annual, cespitose or rhizomatous. | |
Leaves | cauline; sheaths closed; ligules membranous; blades flat to folded; tips mucronate to awned. |
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Inflorescences | terminal racemes; disarticulation above the glumes and beneath the florets. |
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Spikelets | laterally compressed, with 5–20(30) florets. |
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Glumes | unequal to subequal; shorter than the adjacent lemmas; lower glumes 1-veined; upper glumes 1–3-veined. |
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Calluses | rounded, glabrous. |
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Lemmas | 7(9)-veined; veins parallel; margins and tips scarious; tips entire or emarginate, sometimes awned; lemma awns; if present; straight. |
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Paleas | with 2 keels; the keels winged and with 1–2 scabrous awns or smooth; flat, triangular appendages. |
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Anthers | 3. |
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Pleuropogon californicus |
Pleuropogon |
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Distribution | ||
Discussion | Circumboreal. 5 species; 2 species treated in Flora. Semaphore grasses are recognized by their long spikelets attached directly to the inflorescence axis. The palea keels are winged and have awns or appendages. The leaf tips may have small points or even small awns. |
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Source | Flora of Oregon, volume 1, page 448 Barbara Wilson, Richard Brainerd, Nick Otting |
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Sibling taxa | ||
Subordinate taxa | ||
Web links |
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