Festuca yunnanensis Saint-Yves Candollea, iii.386. 1928.
µÁÑòé DIAN YANG MAO.
Festuca yunnanensis Saint-Yves var. genuina Saint-Yves ex Handel-Mazzetti. Subg. Festuca L. sect. Aulaxyer.
Vegetative morphology. Plants loosely tufted. Culms 65–90 cm tall. Culms strict, erect. Culms internodes glabrous, or villous. Culms internodes ridged or striped. Auricles erect swellings, or absent. Auricular cilia present. Leaf blades flat, or conduplicate (usually). Leaf blades 25–35 cm long. Leaf blades 3–5 mm wide. Leaf blades adaxial surfaces glabrous. Leaf blades abaxial surfaces glabrous, or with trichomes. Ribs 5–7.
Floral morphology. Inflorescences loosely open. Inflorescences 12–15(–19) cm long. Inflorescences branches 3–10 cm long. Inflorescences branches at the lowest nodes 2. Spikelets lower third of the branches without spikelets. Spikelets 9–10 mm long. Spikelets greenish, or purplish. Florets 4–5. Glumes glabrous, or with trichomes. Glumes surfaces pubescent. Glumes apices accuminate. First glume lanceolate. First glume 3.8–4.2 mm long. First glume 1 nerved. Second glume lanceolate. Second glume 5.3–5.7 mm long. Second glume 3 nerved. Rachilla internodes antrorsely scabrous. Lemmas 6.8–7.2 mm long. Lemmas veins 5. Lemmas with trichomes. Lemmas scabrous, or villous. Lemmas margins scabrous. Lemmas apices awns (0.5–)1–2(–5) mm long. Paleas equal or subequal to the lemmas. Paleas keels scaberulous, or scabrous. Anthers 2.5–3.5 mm long. Ovary apices glabrous, or hairy (sparsely).
Ecology. Flowering time Jun.-Aug. Mountain area 2900–4800 m.
Notes. If varieties are recognized in this taxon, they are distingisuhed as follows: Glumes smooth, glabrous on back; lemmas upper scabrous on back, margin membranous; palea upper 1/3 part ciliolate along keels...var. yunnanensis Glumes pubescent on back; lemmas long villous on back, margin along ciliate; palea long ciliate along keels...var. villosa.
Illustrations. • 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’.
