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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Festuca fascinata

HABIT Perennial; caespitose; clumped loosely. Culms erect; robust; 60–80 cm long; 1 mm diam.; 2–3 -noded; with 0.5 of their length below uppermost node. Culm-internodes smooth. Leaf-sheaths 17–20 cm long; mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades involute; 14–27 cm long; 1.5–2.5 mm wide. Leaf-blade venation comprising 5–7 vascular bundles. Leaf-blade surface puberulous; hairy adaxially.

INFLORESCENCE Inflorescence a panicle; embraced at base by subtending leaf.

Panicle open; lanceolate; nodding; 11–20 cm long. Primary panicle branches appressed, or ascending; 9–11 cm long; bearing 4–10 fertile spikelets on each lower branch. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets ovate; laterally compressed; 9–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1–1.5 mm long; scaberulous.

GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate; 2–3 mm long; 0.4–0.5 length of upper glume; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume lanceolate; 5–6 mm long; 0.8–0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate, or oblong; 6–7 mm long; chartaceous; much thinner on margins; without keel; 5 -veined. Lemma lateral veins with distinct primaries but obscure intermediates. Lemma surface scabrous; rough above. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 4–8 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels scabrous. Palea apex dentate; 2 -fid. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.5 mm long; yellow. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Poeae. Keng 1996.

Please cite this publication as detailed in How to Cite Version: 3rd February 2016.