Leymus duthiei

HABIT Perennial. Culms 80–100 cm long; 1.5–3 mm diam.; 4–5 -noded. Leaves basal and cauline. Ligule an eciliate membrane; 1–1.5 mm long; truncate. Leaf-blades 10–20 cm long; 6–18 mm wide. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle pilose above.

Racemes 1; single; drooping; bilateral; 10–15 cm long. Rhachis pilose on surface. Spikelet packing broadside to rhachis; lax.

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

FERTILE SPIKELETS Spikelets comprising 1–2 fertile florets; with a barren rhachilla extension. Spikelets lanceolate; dorsally compressed; 9–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus pilose.

GLUMES Glumes persistent; similar. Lower glume subulate; 1–6 mm long; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Upper glume subulate; 1–6 mm long; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous.

FLORETS Fertile lemma lanceolate; 9–11 mm long; coriaceous; without keel; 5 -veined. Lemma surface scabrous; rough generally. Lemma apex acute; awned; 1 -awned. Principal lemma awn 12–25 mm long overall; limb scabrous. Palea lanceolate; 0.9 length of lemma; 2 -veined. Palea keels ciliolate. Palea apex acute. Rhachilla extension 0.33 length of fertile floret.

FLOWER Lodicules 2; scarious; ciliate. Anthers 3. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp; linear; hairy at apex.

DISTRIBUTION Asia-temperate: China and eastern Asia. Asia-tropical: India.

NOTES Triticeae. Koyama.

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