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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Elymus hondae

HABIT Perennial; caespitose; clumped loosely. Culms erect; 70–90 cm long; 3–4 -noded. Culm-nodes glabrous, or pubescent. Leaf-sheaths glabrous on surface to hirsute; with reflexed hairs. Ligule an eciliate membrane; 0.5 mm long. Leaf-blades flat, or involute; 15–20 cm long; 3–7 mm wide. Leaf-blade surface glabrous, or pubescent; densely hairy. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; erect; bilateral; 13–20 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 10–15(–35) mm long.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12–17 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5–2 mm long; pubescent. Floret callus pubescent. Floret callus hairs 0.5–1 mm long.

GLUMES Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate, or oblong; 8–10 mm long; coriaceous; without keels; 3–7 -veined. Lower glume lateral veins prominent. Lower glume surface scabrous; rough on veins. Lower glume apex acute, or acuminate; muticous, or mucronate. Upper glume lanceolate, or oblong; 9–11 mm long; coriaceous; without keels; 3–7 -veined. Upper glume lateral veins prominent. Upper glume surface scabrous; rough on veins. Upper glume apex acute, or acuminate; muticous, or mucronate.

FLORETS Fertile lemma lanceolate; 10 mm long; coriaceous; without keel; 5 -veined. Lemma surface smooth, or scaberulous; rough on veins; glabrous. Lemma apex awned; 1 -awned. Principal lemma awn straight; 15–20 mm long overall. Palea 0.9 length of lemma; 2 -veined. Palea surface pubescent; hairy on back. Palea apex truncate, or obtuse. Apical sterile florets resembling fertile though underdeveloped.

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

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

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Chen 2001.

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