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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 nomnov(Kengyilia pamirica)

HABIT Perennial; caespitose; clumped densely. Culms erect; 60–70 cm long; 1.2–2 mm diam.; 2–3 -noded. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades involute; 9–10 cm long; 2–7 mm wide. Leaf-blade surface hirsute; densely hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pubescent above.

Racemes 1; single; moniliform, or obovate; bilateral; 2–10 cm long; 8–12 mm wide. Rhachis flattened; villous on surface. Spikelet packing broadside to rhachis. Rhachis internodes 2–7 mm long.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 12–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 0.5–2 mm long; pubescent. Floret callus pilose; hairy on the margins. Floret callus hairs 0.8 mm long.

GLUMES Glumes persistent; similar. Lower glume oblong; 6–9 mm long; coriaceous; without keels; 3–5 -veined. Lower glume surface hirsute. Lower glume apex acute; mucronate, or awned; 1 -awned. Lower glume awn 1–2 mm long. Upper glume oblong; 6–9 mm long; coriaceous; without keels; 3–5 -veined. Upper glume surface hirsute. Upper glume apex acute; mucronate, or awned; 1 -awned. Upper glume awn 1–2 mm long.

FLORETS Fertile lemma ovate; 7–9 mm long; coriaceous; 5 -veined. Lemma surface villous. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 10–15 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliate; adorned above. Palea surface puberulous; hairy on back. Palea apex emarginate, or truncate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 3 mm long; yellow, or purple.

FRUIT Caryopsis with adherent pericarp; 6 mm long.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Fl China 2005.

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