GrassBase - The Online World Grass Flora


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

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

Elymus sinosubmuticus

HABIT Perennial; caespitose. Culms erect, or geniculately ascending; 24–45 cm long; 2 -noded; with 0.25 of their length below uppermost node. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule an eciliate membrane, or absent. Leaf-blades flat, or involute; 3–6 cm long; 1.5–3 mm wide. Leaf-blade surface scabrous; rough adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; arcuate; bilateral; 3.5–7.5 cm long. Rhachis scabrous on margins; terminating in a spikelet, or sterile spikelet. Spikelet packing broadside to rhachis; lax. Rhachis internodes 3–9 mm long.

Spikelets in pairs. Fertile spikelets sessile, or pedicelled. Pedicels 1 mm long.

STERILE SPIKELETS Basal sterile spikelets absent, or well-developed; 1–3 in number.

FERTILE SPIKELETS Spikelets comprising (1–)2–3(–4) fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 9–13 mm long; breaking up at maturity; disarticulating below each fertile floret. Spikelet callus base truncate. Rhachilla internodes 1–2 mm long; pubescent. Floret callus pubescent.

GLUMES Glumes similar; shorter than spikelet. Lower glume oblong; 2–3 mm long; 1 length of upper glume; coriaceous; without keels; 3 -veined. Lower glume primary vein scabrous. Lower glume lateral veins obscure. Lower glume apex acute, or acuminate. Upper glume oblong; 2–3 mm long; 0.25–0.33 length of adjacent fertile lemma; coriaceous; without keels; 3 -veined. Upper glume primary vein scabrous. Upper glume lateral veins obscure. Upper glume apex acute, or acuminate.

FLORETS Fertile lemma lanceolate; 7–8 mm long; coriaceous; 5 -veined. Lemma surface puberulous; hairy above; hairy on veins. Lemma apex acute; awned; 1 -awned. Principal lemma awn 1–2 mm long overall. Palea 1 length of lemma. Palea keels ciliolate. Palea apex obtuse. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 1.7 mm long. Stigmas 2. Ovary pubescent on apex.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Asia-temperate: China.

NOTES Triticeae. Keng 1996.

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