Festuca alatavica (Hackel ex Saint-Yves) Roshevitz Komarov, Fl. URSS 2: 528. 1934.
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Festuca rubra subsp. alatavica Saint Yves, l.c. p. 393. 1928. Festuca tianschanica Roshevitz, In Komarov, Fl. URSS 2: 526. 1934. Type: Isolectotype: Kungeir, Alatau, Kokoirak ad fontes fl., Kebin majoris, reg. Alp.,13 VII 1896. V. Brotherus LE. (Tzvelev 1976). Central Asia, Russia, Altai Mountains, "in summa alpe ad fontem fl. Acjulac rarissima", (translation: "Very rare on mountain summit at source of Acjulac River") C.B. Trinius s.n. Holotype and three possible isotypes LE (Tzvelev 1976)! (Image in image library). Subg. Leucopoa (Griseb.) Tzvel., sect. Breviaristatae Krivot.
Vegetative morphology. Rhizomes present (short). Culms 50–60 cm tall. Butt sheaths present. Sheaths glabrous, or with trichomes. Sheaths conspicuous at the base of the plant, persisting for more than 1 year. Auricles erect swellings, or absent. Ligules 0.1–0.3 mm long. Ligules apices erose, or lacerate. Leaf blades flat, or involute. Leaf blades (2–)4–20 cm long. Leaf blades adaxial surfaces with trichomes. Leaf blades adaxial surfaces scabrous. Leaf blades abaxial surfaces with trichomes. Flag leaves blades 2–6 cm long.
Floral morphology. Inflorescences loosely open. Inflorescences branches 3–6 cm long. Inflorescences branches at the lowest nodes 2. Inflorescences branches scabrous on the angles. Spikelets aggregated towards the ends of the branches, or lower third of the branches without spikelets, or lower half of the branches without spikelets. Spikelets 10–12 mm long. Florets 4–5. Glumes glabrous. Glumes apices accuminate. First glume narrowly lanceolate. First glume 4–4.5 mm long. First glume 1 nerved. Second glume broadly lanceolate. Second glume 5–5.5 mm long. Second glume 3 nerved (lateral veins usually obsolete). Lemmas (5–)6–6.5 mm long. Lemmas glabrous, or with trichomes. Lemmas scabrous. Lemmas trichomes on the upper portion. Lemmas apices awns 1–1.5 mm long. Paleas equal or subequal to the lemmas. Paleas keels scabrous. Anthers 3.8–4.2 mm long. Ovary apices hairy (sparsely).
Ecology. Flowering time Aug.-Sep. Near forests, wet places; 2600–4000 m. Distribution. Northwestern China: Xinjiang.
Notes. Classification following Tzvelev (1976). He described the taxon as occurring on sswales and stony slopes, in the upper mountain belt of Central Asia, Jungaria-Tarbagatai,Tien Shan (northern and central).
Illustrations. • Leaf anatomy. Leaf cross section. Candollea, iii.386. 1928, published as F. rubra subsp. alatavica. by Saint-Yves. • Distribution map.
Cite this publication as: ‘Xiang Chen, S.G. Aiken, and M.J. Dallwitz (2002 onwards). Festuca of China: Descriptions, Illustrations, Identification, and Information Retrieval. Version: 4th February 2003. http://www.cdelta.ibcas.ac.cn’.
