Elymus macrochaetus

HABIT Perennial; caespitose. Culms 100–135 cm long. Culm-internodes distally pubescent. Leaf-sheaths antrorsely scabrous. Ligule an eciliate membrane. Leaf-blades 4–8 mm wide. Leaf-blade surface scabrous; rough abaxially; pilose; densely hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes. Peduncle antrorsely scabrous above.

Racemes 1; single; bilateral; 8.5–20 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; lax. 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; 20–22 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume lanceolate; 12–16 mm long; 1 length of upper glume; coriaceous; without keels; 7–9 -veined. Lower glume surface scabrous. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 1–3 mm long. Upper glume lanceolate; 12–16 mm long; 1 length of adjacent fertile lemma; coriaceous; without keels; 7–9 -veined. Upper glume surface asperulous. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1–3 mm long.

FLORETS Fertile lemma lanceolate; 12–16 mm long; coriaceous; 5 -veined. Lemma surface pubescent. Lemma apex acute; awned; 1 -awned. Principal lemma awn straight, or curved; 30–35 mm long overall. Palea 9–13.5 mm long. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3. Stigmas 2. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Triticeae. Fl USSR 1995.

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