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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 parvigluma

HABIT Perennial; caespitose. Rhizomes absent, or elongated. Culms erect; 30–60 cm long; 0.8–1.2 mm diam.; 2–3 -noded. Culm-internodes 5–10 cm long. Leaves mostly basal. Leaf-sheaths glabrous on surface, or puberulous. Ligule an eciliate membrane; 0.5–1 mm long; translucent; truncate. Leaf-blades flat; 10–30 cm long; 2–5 mm wide. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; nodding; 10–20 cm long; 2–5 cm wide. Primary panicle branches 1–2 -nate; rebranched above middle; 8–11 cm long. Panicle axis scabrous. Panicle branches capillary; scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets obovate; laterally compressed; 7–9 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes scaberulous. Floret callus glabrous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume ovate; 1–1.5 mm long; 0.5 length of upper glume; chartaceous; much thinner on margins; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume ovate; 2–3 mm long; 0.33–0.5 length of adjacent fertile lemma; chartaceous; with hyaline margins; without keels; 3 -veined. Upper glume apex obtuse.

FLORETS Fertile lemma oblong; 6–7 mm long; chartaceous; much thinner on margins; without keel; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 3–12 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels smooth, or scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3; 0.7–1 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; oblong; 2.5–3.5 mm long; hairy at apex. Hilum linear.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India.

NOTES Poeae. Koyama 1994.

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