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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 kamtschatica

HABIT Perennial; caespitose; clumped densely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Basal innovations intravaginal. Culms 15–30 cm long. Culm-internodes smooth. Leaf-sheaths open for most of their length; with 0.25–0.33 of their length closed; with flat margins; glabrous on surface. Leaf-sheath auricles erect; obtuse. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades filiform; conduplicate; circular in section; 0.3–0.6 mm wide; stiff. Leaf-blade venation comprising 5–7 vascular bundles; with 1–3 inner ridges; with subepidermal sclerenchyma strands similar in size; with subepidermal sclerenchyma free from veins; without layer of subepidermal sclerenchyma masking vein striation. Leaf-blade surface scabrous; rough abaxially; pubescent; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; 3–4.5 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets with diminished florets at the apex. Spikelets oblong; laterally compressed; 7–9 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; chartaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acute. Upper glume lanceolate; 0.9 length of adjacent fertile lemma; chartaceous; without keels; 3 -veined. Upper glume apex acute.

FLORETS Fertile lemma oblong; 3.8–4.7 mm long; chartaceous; without keel; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1.3–1.6 mm long overall. Palea 2 -veined. Palea keels scabrous; with 0.33 of their length adorned. Palea apex erose. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2. Anthers 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; ellipsoid. Hilum linear. Disseminule comprising a caryopsis and palea.

DISTRIBUTION Asia-temperate: Soviet far east.

NOTES Poeae. Zlaki 1997.

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