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Descriptions

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

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

Elymus kuramensis

HABIT Perennial; caespitose. Culms erect; 30–70 cm long; 3 -noded. Culm-internodes distally pubescent. Culm-nodes pubescent. Leaf-sheaths puberulous; outer margin hairy. Ligule an eciliate membrane; 0.2–0.4 mm long; pubescent on abaxial surface; lacerate; truncate. Leaf-blades 6–14 cm long; 2–2.5 mm wide; glaucous. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade margins scaberulous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle smooth; glabrous.

Racemes 1; single; erect, or drooping; bilateral; 3–9.5 cm long. Rhachis flattened; glabrous on surface; ciliate on margins. Spikelet packing broadside to rhachis; lax.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with diminished florets at the apex. Spikelets lanceolate; laterally compressed; 10–13 mm long; falling entire. Spikelet callus base truncate. Rhachilla internodes scaberulous.

GLUMES Glumes similar; shorter than spikelet. Lower glume lanceolate; 5–6 mm long; 0.75 length of upper glume; coriaceous; much thinner on margins; without keels; 1–5 -veined. Lower glume surface asperulous; rough on veins. Lower glume apex acute; muticous, or mucronate. Upper glume lanceolate; 6–8 mm long; 1 length of adjacent fertile lemma; coriaceous; with scarious margins; without keels; 1–5 -veined. Upper glume surface asperulous; rough on veins. Upper glume apex acute; muticous, or mucronate.

FLORETS Fertile lemma lanceolate, or oblong; 6–8 mm long; coriaceous; keeled; keeled above; 5 -veined. Lemma surface scabrous; rough above. Lemma apex acute; awned; 1 -awned. Principal lemma awn 9–15 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate; adorned above. Palea surface puberulous; hairy on back; hairy above. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2 mm long. Stigmas 2.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Triticeae. Bor 1997.

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