GrassBase - The Online World Grass Flora

Descriptions

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

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

Festuca pseudosupina

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with soft dead sheaths, or fibrous dead sheaths. Basal innovations intravaginal. Culms slender; 10–17 cm long. Leaf-sheaths open for most of their length; with 0.3–0.4 of their length closed. Leaf-sheath auricles erect. Ligule an eciliate membrane; 0.4–0.8 mm long; pubescent on abaxial surface. Leaf-blades curved; filiform; conduplicate; 0.3–0.5 mm wide; glaucous. Leaf-blade venation comprising 5 vascular bundles; with 1 inner ridges; with subepidermal sclerenchyma free from veins; with continuous uniform subepidermal sclerenchyma layer on the underside. Leaf-blade surface smooth; glabrous. Leaf-blade apex attenuate; pungent.

INFLORESCENCE Inflorescence a panicle. Peduncle smooth.

Panicle open; lanceolate; loose; 1.5–3.5 cm long. Panicle branches pubescent.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels pubescent; tip widened.

FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; 8.2 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 4.6–4.9 mm long; 0.75 length of adjacent fertile lemma; chartaceous; with scarious margins; without keels; 3 -veined. Upper glume margins ciliolate. Upper glume apex acute.

FLORETS Fertile lemma lanceolate; 5–5.2 mm long; 1.8–1.9 mm wide; chartaceous; light green; without keel; 5 -veined. Lemma surface scaberulous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 5–5.2 mm long overall. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

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

FRUIT Caryopsis with adherent pericarp; glabrous. Hilum linear; 0.75 length of caryopsis.

DISTRIBUTION Asia-temperate: western Asia.

NOTES Poeae. Fl Turk 1997.

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