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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 brunnescens

HABIT Perennial; caespitose; clumped densely. Basal innovations intravaginal. Culms 20–50 cm long. Leaf-sheaths open for most of their length, or tubular for much of their length; with 0.15–0.33 of their length closed; antrorsely scabrous. Leaf-sheath auricles erect. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades filiform; conduplicate; elliptic in section; 0.5–0.8 mm wide; glaucous; pruinose. Leaf-blade venation comprising 5 vascular bundles; with 3(–5) inner ridges; with 3 subepidermal sclerenchyma strands; with subepidermal sclerenchyma free from veins; without layer of subepidermal sclerenchyma masking vein striation, or with sclerenchyma strands widened to form a discontinuous subepidermal layer, or with unevenly thickened subepidermal sclerenchyma layer on the underside. Leaf-blade surface scabrous; glabrous.

INFLORESCENCE Inflorescence a panicle. Peduncle antrorsely scabrous above.

Panicle open; lanceolate; dense; 3–6 cm long. Panicle branches scaberulous, or scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 4–7 fertile florets; with diminished florets at the apex. Spikelets elliptic, or oblong; laterally compressed; 8.5–9 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; 4.3–5.3 mm long; chartaceous; without keels; 3 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma elliptic; 4.8–6 mm long; chartaceous; without keel; 5 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1–3 mm long overall; 0.25–0.5 length of lemma. Palea 1 length of lemma; 2 -veined. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; glabrous. Hilum linear.

DISTRIBUTION Asia-temperate: Caucasus and western Asia.

NOTES Poeae. Fl Turk 1999.

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