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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 sinkiangensis

HABIT Perennial; caespitose. Culms 60–70 cm long; 2–3 -noded. Leaf-sheaths pubescent; with reflexed hairs. Ligule an eciliate membrane; 0.3 mm long. Leaf-blades flat, or conduplicate; 3–5 mm wide. Leaf-blade surface hirsute; sparsely hairy; hairy adaxially. Leaf-blade margins ciliate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight; bilateral; 7–10 cm long. Rhachis glabrous on surface; ciliate on margins. Spikelet packing broadside to rhachis; 2 -rowed. Rhachis internodes 4–7 mm long.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 13–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus base truncate.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 9–10 mm long; 0.9 length of upper glume; coriaceous; without keels; 3–5 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acuminate; muticous, or mucronate, or awned; 1 -awned. Lower glume awn 1–2 mm long. Upper glume lanceolate; 10–12 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 3–5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acuminate; muticous, or mucronate, or awned; 1 -awned. Upper glume awn 1–2 mm long.

FLORETS Fertile lemma elliptic; 10–12 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy above. Lemma margins pubescent. Lemma apex acute; awned; 1 -awned. Principal lemma awn curved; 20–35 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.5–2 mm long; yellow. Stigmas 2. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Cui 1996.

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