Elymus angsaiensis

HABIT Perennial; caespitose. Culms 25–50 cm long. Leaf-sheaths mostly shorter than adjacent culm internode. Leaf-sheath auricles falcate; 1 mm long. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades flat, or conduplicate, or involute; 2.5–7 cm long; 2–5 mm wide. Leaf-blade surface glabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; drooping; flexuous; bilateral; 4–13 cm long. Rhachis flattened; glabrous on surface. Spikelet packing broadside to rhachis; lax. Rhachis internodes linear; 8–17 mm long.

Spikelets in pairs. Fertile spikelets sessile, or sessile and pedicelled. Pedicels 1 mm long; pubescent.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 8–15 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 2–3 mm long; pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4 mm long; 0.75 length of upper glume; coriaceous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous; rough on veins; glabrous. Lower glume apex acuminate. Upper glume lanceolate; 5 mm long; 0.5–0.75 length of adjacent fertile lemma; coriaceous; without keels; 3 -veined. Upper glume surface scabrous; rough on veins; glabrous. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate, or oblong; 7–9 mm long; coriaceous; 5 -veined. Lemma surface scaberulous. Lemma apex acute; awned; 1 -awned. Principal lemma awn ascending, or spreading; 5–15 mm long overall. Palea 1 length of lemma. Palea keels scaberulous. Palea surface scaberulous (above). Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1.5 mm long; yellow.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Wu, Lu & Zhang 2009.

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