Festuca kansuensis Markgraf-Dann. Acta Bot. Acad. Sci. Hung. 19(1–4): 207–209. 1973.
¸ÊËàÑòé GAN SU YANG MAO.
Subg. Festuca L. sect. Aulaxyer.
Vegetative morphology. Plants densely tufted. Plants clumped moderately. Plants with non-flowering shoots more common than flowering shoots. Plants with leaves mostly basal. Plants with shoots intravaginal. Culms 20–30(–50) cm tall. Culms geniculate (slightly), or strict, erect. Culms internodes glabrous. Culms nodes 2. Sheaths shorter than the internode. Sheaths glabrous, or with trichomes. Sheaths pubescent (rarely). Sheaths Sheaths remaining entire, not conspicuously splitting between the veins. Auricles erect swellings (breviter auriculatae). Ligules 0.4–0.6 mm long. Ligules margins ciliate. Leaf blades filiform. Leaf blades conduplicate. Leaf blades 10–15(–25) cm long. Leaf blades adaxial surfaces with trichomes. Leaf blades adaxial surfaces glabrescent, or scabrous. Leaf blades abaxial surfaces with trichomes. Leaf blades abaxial surfaces scabrous. Leaf blades (0.25–)0.3–0.5 mm wide. Veins 5. Adaxial to abaxial sclerenchyma strands absent. Abaxial sclerenchyma well developed. Abaxial sclerenchyma in broad bands or continuous. Ribs 5 (central rib and 4 lateral ribs well defined).
Floral morphology. Inflorescences oblong, or ovate. Inflorescences loosely open, or spiciform. Inflorescences branches at the lowest nodes 1, or 2. 1–3 fertile spikelets on the longest branches. Inflorescences branches scabrous on the angles. Inflorescences branches vestiture sparse. Spikelets lower half of the branches without spikelets. Spikelets 7–8 mm long. Spikelets greenish, or yellowish, or purplish. Spikelets broadly lanceolate. Florets 3–4. Glumes with trichomes (second glume). Glumes surfaces scabrous. Glumes vestiture at the apex. Glumes margins ciliolate (minutely). Glumes margins narrowly membranous. Glumes apices accuminate. First glume linear, or narrowly lanceolate. First glume 3–3.4 mm long. First glume 0.7 mm wide. Second glume narrowly lanceolate. Second glume 4.2–4.8 mm long. Second glume 1.1–1.3 mm wide. Second glume similar in length to first lemma. Lemmas 5.3–5.7 mm long (1.6–1.7 mm wide). Lemmas lanceolate (narrowly). Lemmas with trichomes. Lemmas scabrous. Lemmas trichomes on the upper portion. Lemmas margins scaberulous. Lemmas apices awns 1.5–2.7 mm long. Lemmas apices awns much shorter than the lemmas. Paleas equal or subequal to the lemmas. Paleas inter-keel regions scabrous. Anthers (2.1–)2.5–3 mm long. Ovary apices glabrous, or hairy. Ovary hairs sparse.
Ecology. Flowering time Jun.-Aug. On mountain slopes, meadows steppes; 3200–3700 m. Distribution. Northwestern China: Gansu, Qinghai.
Notes. Markgraf-Dannenberg (1973) when she described this taxon suggested that it is close to F. jacutica. She noted that a near relative is F. nubigena Jangh. in Java.
Illustrations. • leaf anatomy. Leaf cross section as illustrated in the original description (Markgraf-Dannebeng (1973) , Leaf blades were described as (0.25-)0.3–0.5 mm in diameter; veins 5: three large, and two smaller; adaxial to abaxial sclerenchyma strands absent. Abaxial sclerenchyma well developed. Abaxial sclerenchyma in broad bands or continuous; ribs 5 (central rib and 4 lateral ribs well defined). • 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’.
