Poa cuspidata |
Poa howellii |
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Howell's bluegrass |
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Habit | Plants annual, rarely perennial, (10)25– 80(120) cm tall; densely cespitose. | |
Basal branching | intravaginal. |
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Leaves | sheaths closed 50% or more of their length; ligules 1.5–5(10)mm, blades of tillers flat, 1–7(10) mm wide, finely scabrous; cauline blades 2–10 cm. |
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Inflorescences | erect, eventually open, 10–25(30)cm; the branches eventually spreading or reflexed. |
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Spikelets | (2)4– 6 mm; florets 2–5; rachilla internodes about 1 mm; smooth, softly puberulent or occasionally glabrous. |
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Glumes | slightly unequal; keels and sometimes lateral veins scabrous; lower glumes 1–3-veined. |
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Culm | nodes terete. |
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Calluses | with sparse cobwebby hairs on at least some florets. |
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Lemmas | lanceolate to narrowly lanceolate, 2.5– 3.5 mm, distinctly keeled, evenly crisply puberulent near the base, finely scabrous distally; margins narrowly hyaline; tips narrowly acute, rarely purple. |
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Anthers | 0.2–1 mm. |
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Poa cuspidata |
Poa howellii |
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Distribution | ||
Discussion | Open, often moist woods and bottomlands, often with moss or boulders. 0–1100m. Casc, ECas, Sisk, WV. CA, WA; north to British Columbia. Native. |
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Source | Flora of Oregon, volume 1, page 457 Rob Soreng, Barbara Wilson, Richard Brainerd, Nick Otting |
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Sibling taxa | ||
Web links |
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