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

63b. Poa szechuensis var. rossbergiana (K. S. Hao) Soreng & G. Zhu, Fl. China. 22: 295. 2006.

罗氏早熟禾 luo shi zao shu he

Basionym: Poa rossbergiana K. S. Hao, Bot. Jahrb. Syst. 68: 581. 1938; P. rohmooana Noltie.

Annuals, densely tufted. Culms 1–10 cm tall, nodes 1 or 2. Leaf sheaths smooth, uppermost 1–3 cm; ligule 1–2 mm. Panicle (1–)2–4 cm, longest internodes 0.5–1.5 cm; longest branches 1–2 cm. Florets 3 or 4; glumes ovate to lanceolate; lemma keel and marginal veins partly hairy; callus glabrous. Fl. and fr. Jun–Sep.

Alpine grassy slopes, in and around Kobresia mats, moraine gravels, silts; 4200–4700 m. Qinghai, Xizang [India (Sikkim)].

Included here are densely tufted, dwarf, high-alpine forms with sparsely pubescent lemmas. This race is similar in form to Poa pseudo-abbreviata Roshevitz, but that species is perennial and occurs in arctic Russia and North America. The other varieties comprise lower-elevation and some subalpine plants that are taller, with leafy culms.


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