Elymus sibinicus

HABIT Perennial; caespitose; clumped densely. Culms geniculately ascending; 70–120 cm long. Culm-internodes smooth; distally glabrous. Culm-nodes glabrous, or pubescent. Ligule an eciliate membrane. Leaf-blades 8–15 mm wide. Leaf-blade surface scaberulous; rough abaxially; pilose; sparsely hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight; bilateral; 13–18 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; crowded. Rhachis internodes linear.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pilose. Floret callus pilose.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 9–11 mm long; 1 length of upper glume; coriaceous; much thinner on margins; without keels; 5–7 -veined. Lower glume surface scabrous. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 2–5 mm long. Upper glume lanceolate; 9–11 mm long; 1 length of adjacent fertile lemma; coriaceous; with hyaline margins; without keels; 5–7 -veined. Upper glume surface scabrous. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 2–5 mm long.

FLORETS Fertile lemma lanceolate; 9–10 mm long; coriaceous; 5 -veined. Lemma surface scabrous. Lemma apex acute; awned; 1 -awned. Principal lemma awn curved; 10–16 mm long overall. Palea 1 length of lemma. Palea keels scaberulous. Palea surface scaberulous. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.5–1.8 mm long.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Triticeae. Kotuchov 2006.

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