Comments
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Most botanists recognize Poa attenuata as one of the most complicated and problematic complexes in the flora of C Asia. It has hybridized with P. glauca to form an apomictic complex, which is treated here as P. albertii, while P. attenuata is supposed to be a more or less pure group of xeromorphic alpine populations.
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- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Comments
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3300-5500 m.
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Comments
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Poa albertii represents an apomictic hybrid complex combining the characters of the parent species P. attenuata s.l. and P. glauca s.l., and perhaps additionally P. versicolor subsp. relaxa.
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Description
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Culms densely tufted, 7–15(–25) cm tall, pale, glabrous or slightly scabrid under the panicle, nodes 2, both near culm base. Shoots usually intravaginal. Leaf sheath usually slightly scabrid, uppermost 1/2 as long as internode; blade folded or inrolled to needle-shape, firm, usually up to 1/2 as long as sheath, 0.3–0.8(–1.5) mm wide, scabrid; ligule 1.5–2.5 mm. Panicle dense, contracted to spiciform, a bit more open at anthesis, 1.5–4 × 0.4–1 cm; branches 2 or 3 per node, 1/5–1/3 as long as panicle. Spikelets lanceolate, (2.5–)3–4.5(–5) mm, florets 2 or 3(–5); rachilla warty; glumes shorter than spikelet, usually equal to first lemma, lemma (2.5–)3–3.5 mm, keel shortly villous for 1/2 of length, marginal veins for 1/3, other parts glabrous; callus webbed or glabrous; palea glabrous between veins. Anthers 1.2–1.5 mm. Fl. Jun–Aug.
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Description
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Tufted perennial without rhizomes; culms (10-) 25-50cm high, erect. Leaf-blades folded or setaceous-involute, 1.5-10cm long, 1-3mm wide, scabrid on the margins; ligule blunt, 1.5-2.5mm long. Panicle oblong, 2.5-9 cm long, contracted; branches solitary or paired, short, ascending, scabrid. Spikelets 2-4-flowered, ovate-elliptic, becoming somewhat wedge-shaped, 4-5.5mm long, often tinged with purple; glumes unequal, 3-nerved, ovate, the lower 2.3-3.3 mm long, the upper broader, (2.5-)3-3.5 mm long; lemmas oblong in side-view, (2-)2.3-3(-3.2)mm long, acute or subacute, ciliate on the keel and marginal nerves, without any wool at the base; palea almost as long as to slightly longer than the lemma, scabrid along the keels; anthers 1-1.8 mm long.
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Description
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Culms dense to loosely tufted, 7–15(–25) cm tall, scabrid (sometimes only slightly), nodes 1 or 2, usually near base. Shoots extravaginal, rarely some intravaginal, sometimes with ascending tillers. Leaf sheath scabrid; blade flat, folded or inrolled, (0.5–)1.5–2(–3) mm wide, scabrid; ligule 1–2.5(–3.5) mm. Panicle oblong, narrow, dense to quite loose, (2–)4–6 × 0.5–1.5 cm; branches 2–5 per node, primary basal branch 2/7–2/3 as long as panicle. Spikelets lanceolate, sometimes tinged with purple or variegated, 3–4(–6) mm, florets 2 or 3; sometimes upper floret viviparous; rachilla smooth, warty or papillose; lower glume 1.5–2 mm, upper glume 2–2.5 mm; lemma narrowly lanceolate, glabrous to uniformly pubescent, apex acuminate; callus webbed or glabrous; palea glabrous or smooth between keels. Anthers 1.2–1.5 mm. Fl. and fr. Jul–Aug. 2n = 28, 42.
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Distribution
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Gansu, Hebei, Nei Mongol, Qinghai, Shaanxi, Sichuan, Xinjiang, Xizang, Yunnan [Bhutan, India, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Pakistan, Russia (Siberia), Tajikistan, Uzbekistan].
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Distribution
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Distribution: Pakistan (N.W.F.P., Gilgit & Kashmir); Siberia, Mongolia and Central Asia.
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Distribution
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Himalaya (Nepal, Sikkim), Tibet.
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Distribution
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Gansu, Nei Mongol, Qinghai, Shaanxi, Sichuan, Xinjiang, Xizang, Yunnan [Afghanistan, Bhutan, India, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Pakistan, Russia, Tajikistan, Uzbekistan; SW Asia (Iran)].
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Elevation Range
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4000-5800 m
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Flower/Fruit
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Fl. Per.: July
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Habitat
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Dry grasslands, rocky and stepped slopes; 3300–5500 m.
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Habitat
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Alpine grasslands; 2000–5600 m.
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