Poa lettermanii |
Poa pratensis |
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Letterman's blue grass |
Kentucky bluegrass |
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Habit | Strongly rhizomatous perennial, the culms hollow, glabrous, 4-10 dm. tall. | |
Leaves | Sheaths closed about half their length; ligules 1-1.5 mm. long, truncate, usually entire; blades flat, numerous, 2-4 mm. broad, the tips strongly prow-shaped. |
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Flowers | Inflorescence a moderately loose panicle 3-10 cm. long, the branches slightly ascending, the lower ones 3-5 per node; spikelets 3- to 5-flowered; glumes 2.5 and 3 mm. long, strongly keeled; lemmas about 3.5 mm. long, strongly keeled, cobwebby at the base; palea subequal to the lemma, 2-keeled. |
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Poa lettermanii |
Poa pratensis |
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Flowering time | July-September | April-October |
Habitat | Mesic to wet, rocky, alpine slopes | Moist, distrurbed areas from the coast to middle elevations. |
Distribution | Occurring in the Cascades Range in Washington; British Columbia to California, east to the Rocky Mountains.
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Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast: circumboreal.
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Origin | Native | Both native and introduced |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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