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FOC | Family List | FOC Vol. 22 | Poaceae | Poa

80. Poa albertii Regel, Trudy Imp. S.-Peterburgsk. Bot. Sada. 7: 611. 1881.

阿拉套早熟禾 a la tao zao shu he

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.

Alpine grasslands; 2000–5600 m. Gansu, Nei Mongol, Qinghai, Shaanxi, Sichuan, Xinjiang, Xizang, Yunnan [Afghanistan, Bhutan, India, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Pakistan, Russia, Tajikistan, Uzbekistan; SW Asia (Iran)].

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.

1 Panicle with viviparous spikelets.   80c subsp. arnoldii
+ Panicle without viviparous spikelets   (2)
2 (1) Lemma glabrous between veins   (3)
+ Lemma pubescent between veins   (4)
3 (2) Lemma distinctly pubescent on keel and marginal veins.   80a subsp. albertii
+ Lemma entirely glabrous (rarely with a few short hairs).   80d subsp. poophagorum
4 (2) Panicle contracted, densely ovoid to spiciform, branches up to 1(–1.5) cm, spikelets crowded, 3–4(–5) mm; upper-most internode not more than 1 mm wide; leaf blade firm, narrow, folded or inrolled; plant pale or grayish yellow, glumes sometimes with purplish bands.   80b subsp. kunlunensis
+ Panicle elongated, sometimes quite open, branches up to 1.5–2 cm, spikelets moderately crowded to sparse; (3.8–)4–5.5(–6) mm; upper- most internode frequently up to 1.5–2 mm wide; leaf blade withering, folded or flat; plant glaucous, frequently glumes and vegetative parts strongly purplish.   80e subsp. lahulensis


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