Poa lettermanii |
Poa iconia |
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Letterman's bluegrass |
Turkish bulbous bluegrass |
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Habit | Plants perennial, 1–12 cm tall; densely cespitose. | |
Basal branching | intra- and extravaginal or mainly intravaginal. |
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Leaves | sheaths closed to 25% of their length; ligules 1–3 mm; blades flat or folded, or slightly inrolled, 0.5–2 mm wide. |
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Inflorescences | erect, contracted, 1–3 cm long, usually exserted from the sheaths; branches erect to steeply ascending; slender; to 1.5 cm. |
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Spikelets | 3–4 mm, green or purple; florets 2–3; rachilla internodes less than 1 mm long; smooth. |
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Glumes | lanceolate to broadly lanceolate, 2.4– 3.6(4) mm, usually equaling or exceeding the lowest lemma, frequently exceeding the upper florets; lower glumes 3-veined. |
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Calluses | glabrous. |
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Lemmas | lanceolate, 2.5–3 mm long, distinctly keeled; thin, glabrous; keels and marginal veins rarely sparsely puberulent; tips acute. |
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Anthers | 0.2–0.8 mm. |
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2n | =14. |
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Poa lettermanii |
Poa iconia |
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Distribution | ||
Discussion | Rocky alpine ridges and ledges. 2900–3100m. Casc. CA, ID, NV, WA; north to British Columbia, east to CO. Native. This is a small, cespitose, alpine bluegrass, most similar to P. suksdorfii. Both have subequal glumes that tend to be longer than the lowest lemma, but P. suksdorfii has larger spikelets with longer glumes. In Oregon, P. lettermanii is known only from high elevation on South Sister in the central Cascades. |
[This taxon does not have a floristic treatment in Flora of Oregon.] |
Source | Flora of Oregon, volume 1, page 459 Rob Soreng, Barbara Wilson, Richard Brainerd, Nick Otting |
Flora of Oregon, volume 1 |
Sibling taxa | ||
Subordinate taxa | ||
Web links |
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