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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 kansuensis

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms erect; 20–30 cm long; 2 -noded; with 0.15–0.2 of their length below uppermost node. Culm-nodes glabrous. Lateral branches lacking. Leaf-sheaths tubular for much of their length; with 0.5 of their length closed; glabrous on surface, or puberulous. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades filiform; conduplicate; circular in section; 0.2–0.5 mm wide; glaucous. Leaf-blade venation with 5 secondary veins; 5 inner ridges; 7 subepidermal sclerenchyma strands. Leaf-blade surface scabrous; rough abaxially. Leaf-blade apex abruptly acute.

INFLORESCENCE Inflorescence a panicle.

Panicle open; oblong, or ovate. Primary panicle branches 1–2 -nate; bearing 1–3 fertile spikelets on each lower branch. Panicle branches scaberulous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 7–8 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 3.3–4 mm long; 0.75 length of upper glume; membranous; without keels. Lower glume margins ciliolate. Lower glume apex acuminate. Upper glume lanceolate; 4.2–4.8 mm long; 0.7–0.8 length of adjacent fertile lemma; membranous; without keels. Upper glume margins ciliolate. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 5.5 mm long; membranous; without keel; 5 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1.5–2.7 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3; 2.5–2.9 mm long. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Poeae. Mark-Dann 1995.

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