Leymus coreanus

HABIT Perennial; culms solitary. Rhizomes short. Butt sheaths pubescent. Culms erect; 60–110 cm long; 3–4 -noded. Culm-internodes distally glabrous. Leaves basal and cauline. Leaf-sheaths glabrous on surface. Ligule an eciliate membrane; 1 mm long; truncate. Leaf-blades linear, or lanceolate; 15–47 cm long; 6–11 mm wide. Leaf-blade surface scabrous; rough on both sides; pubescent; sparsely hairy, or moderately hairy; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pubescent above, or pilose above.

Racemes 1; single; straight, or arcuate; bilateral; 8–13 cm long; 10 mm wide. Rhachis pubescent on surface. Spikelet packing broadside to rhachis; lax.

Spikelets in pairs. Fertile spikelets sessile; 2 in the cluster.

FERTILE SPIKELETS Spikelets comprising 2–5 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 12–20 mm long; breaking up at maturity; disarticulating above glumes but not between florets. Rhachilla internodes scaberulous.

GLUMES Glumes persistent; similar; shorter than spikelet. Lower glume subulate; 7–8 mm long; 0.75–0.8 length of upper glume; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Upper glume subulate; 8.5–10 mm long; 1 -veined. Upper glume lateral veins absent.

FLORETS Fertile lemma lanceolate, or elliptic; 9–11 mm long; coriaceous; without keel; 5–7 -veined. Lemma surface scaberulous; glabrous. Lemma apex attenuate; awned; 1 -awned. Principal lemma awn 2–3 mm long overall. Palea 8–10 mm long; 0.9 length of lemma. Palea keels ciliolate. Palea apex dentate; 2 -fid.

FLOWER Lodicules 2. Anthers 3; 6–7 mm long. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex.

DISTRIBUTION Asia-temperate: Soviet far east, China, and eastern Asia.

NOTES Triticeae. Koyama 1994.

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