Elymus aduoensis

HABIT Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with fibrous dead sheaths. Culms erect; 25 cm long; 2 -noded. Leaf-sheaths smooth; glabrous on surface. Leaf-sheath auricles falcate; 1 mm long. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades 2–3(–5) cm long; 2–3 mm wide. Leaf-blade surface pubescent; densely hairy; hairy on both sides. Leaf-blade margins ciliate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight, or flexuous; bilateral; 4 cm long. Rhachis flattened. Spikelet packing broadside to rhachis; lax; regular; 2 -rowed. Rhachis internodes 5 mm long.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 3–4 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5–2.5 mm long; pubescent. Floret callus pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 4–4.6 mm long; 0.66 length of upper glume; coriaceous; without keels; 5 -veined. Lower glume apex acuminate. Upper glume lanceolate; 6–6.5 mm long; coriaceous; without keels; 5 -veined. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate, or oblong; 9–10 mm long; coriaceous; without keel; 5 -veined. Lemma surface scaberulous; rough below. Lemma apex awned; 1 -awned. Principal lemma awn straight; reflexed; 15–26 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels ciliolate; adorned above; with 0.33 of their length adorned. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 1 mm long; green.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Lu & Wu 2009.

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