Festuca kryloviana Reverdatto Animadv. Syst. Herb. Univ. Tomsk. 2: 3. 1927.
º®ÉúÑòé HAN SHENG YANG MAO.
Subg. Festuca L. sect. Festuca.
Vegetative morphology. Plants stiffly erect, or softly erect. Plants turf forming, or densely tufted. Plants clumped loosely, or moderately. Plants with non-flowering shoots more common than flowering shoots. Plants with leaves mostly basal. Plants with tillering leaves 1/4 to 1/3 the length of the culms, or over half the length of the culms. Plants with shoots intravaginal. Culms (15–)20–55 cm tall. Culms 0.7–0.9 mm wide. Culms geniculate, or strict, erect (usually). Culms internodes glabrous, or pubescent. Culms nodes 1. Uppermost culms nodes in lower 1/3 of the culm. Sheaths shorter than the internode. Sheaths glabrous, or with trichomes. Sheaths scabrous. Sheaths not conspicuous at the base of the plant. Sheaths splitting between the veins, or remaining entire, not conspicuously splitting between the veins (usually). Collars glabrous, or pubescent. Auricles erect swellings. Ligules 0.2–0.6 mm long. Ligules membranous. Ligules margins ciliate. Ligules apices erose. Leaf blades erect, stiffish, or more or less lax. Leaf blades filiform. Leaf blades conduplicate. Leaf blades 8–18 cm long. Leaf blades adaxial surfaces with trichomes. Leaf blades adaxial surfaces glabrescent, or pubescent. Leaf blades abaxial surfaces glabrous, or with trichomes. Leaf blades abaxial surfaces glabrescent, or pubescent (or scaberulous). Leaf blades margins scaberulous. Flag leaves blades 3–5 cm long. Flag leaves blades distinctly shorter than the sheath (4/8). Leaf blades 0.3–0.4 mm wide. Leaf blades 0.6–0.8 mm deep. Veins (5–)7. Adaxial to abaxial sclerenchyma strands absent. Abaxial sclerenchyma poorly developed, or well developed. Abaxial sclerenchyma in narrow or discrete strands, or in broad bands or continuous.
Floral morphology. Inflorescences narrowly lanceolate, or lanceolate. Inflorescences loosely open, or contracted (usually). Inflorescences (1.5–)3–7 cm long. Inflorescences branches 1–2.5 cm long. Inflorescences lowest internodes 0.8–2 cm long. Inflorescences branches at the lowest nodes 1. Inflorescences branches stiff, or flexible. Inflorescences branches appressed after anthesis. 3–4 fertile spikelets on the longest branches. Inflorescences branches angular in cross section, or flattened and ribbon-like. Inflorescences branches scabrous on the angles. Inflorescences branches vestiture sparse, or moderate. Pedicels 1–5 mm long. Spikelets evenly distributed along the branches, or lower third of the branches without spikelets. Spikelets 6–8 mm long. Spikelets 4.5–8 mm wide. Spikelets greenish, or brown (rare). Spikelets broadly lanceolate, or lanceolate. Florets 4–6. Glumes glabrous, or with trichomes. Glumes surfaces scabrous. Glumes vestiture at the apex, or on the veins. Glumes margins ciliolate. Glumes margins narrowly membranous (narrowly). Glumes apices accuminate. First glume narrowly lanceolate, or lanceolate. First glume 2.5–4 mm long. First glume 1 nerved. First glume 0.5–0.8 as long as second glume. Second glume lanceolate, or broadly lanceolate. Second glume 3.7–5 mm long. Second glume 3 nerved. Second glume similar in length to first lemma. Second glume 0.7–0.8 as long as the spikelets. Rachilla internodes 0.8–1 mm long. Rachilla internodes antrorsely scabrous. Rachilla internodes flattened, or cylindrical. Rachilla internodes narrow. Rachilla internodes curved, or zigzag. Lemmas 4.5–5.5(–6) mm long. Lemmas lanceolate. Lemmas rounded on the back. Lemmas veins 5. Lemmas nerveless in dorsal view or sometimes with only the centre vein distinct. Lemmas glabrous, or with trichomes. Lemmas scabrous. Lemmas trichomes over the entire surface. Lemmas margins smooth, or scabrous. Lemmas upper margins narrowly membranous, or not membranous. Lemmas apices accuminate. Lemmas apices awns (1.5–)2–3(–4) mm long. Lemmas apices awns much shorter than the lemmas. Paleas 4–5.2 mm long. Paleas equal or subequal to the lemmas. Paleas keels scabrous. Paleas inter-keel regions punctiform, or scabrous. Lodicules without marginal teeth. Lodicules glabrous. Lodicules 0.6–0.7 mm long. Anthers 1.6–2.6 mm long. Ovary apices glabrous. Fruits 2.5–3 mm long (immature).
Ecology. Flowering time Jun.-Aug. On alpine meadows, semi-desert steppes, in grassy places of mountain slopes ; 1300–2600 m. Distribution. Northwestern China: Xinjiang. Northern China: Hebei.
Notes. Classification following Tzvelev (1976). Alexeev (1977) shows leaf cross section very like F. lenensis.
Illustrations. • Leaf cross section. Leaf blades conduplicate, 0.3–0.4 mm wide, 0.6–0.8 mm deep; veins 5; adaxial to abaxial sclerenchyma strands absent; abaxial sclerenchyma well developed, in discrete broad bands at the midrib and leaf margins. • 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’.
