Elymus amgensis

HABIT Perennial; caespitose; clumped loosely. Culms erect; 60–120 cm long. Culm-internodes smooth; distally glabrous. Ligule an eciliate membrane. Leaf-blades 4–8 mm wide. Leaf-blade surface scabrous; pilose; densely hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; bilateral; 10–20 cm long. Rhachis flattened. Spikelet packing broadside to rhachis; distant; regular; 2 -rowed.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 2–5 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 7–9 mm long; 1 length of upper glume; coriaceous; without keels; 3–5 -veined. Lower glume apex acuminate; awned. Lower glume awn 1–2 mm long. Upper glume lanceolate; 7–8 mm long; 0.7–0.8 length of adjacent fertile lemma; coriaceous; without keels; 3–5 -veined. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1–2 mm long.

FLORETS Fertile lemma lanceolate to oblong; 9–11 mm long; coriaceous; without keel; 5 -veined. Lemma surface scaberulous; rough above; puberulous; hairy at base. Lemma apex acute; awned; 1 -awned. Principal lemma awn straight, or curved; 7–13 mm long overall. Palea 1 length of lemma; 2 -veined. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Triticeae. Tzvelev 2011.

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