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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 strictus

HABIT Perennial; caespitose; clumped loosely. Culms erect; 50–60 cm long; 3 -noded. Leaf-sheaths subequal to internodes; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; truncate. Leaf-blades involute; 8–16 cm long; 4–6 mm wide; light green, or glaucous. Leaf-blade surface pubescent; hairy adaxially.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight; bilateral; 14–18 cm long. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 6–11(–20) mm long.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–8 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 15–20 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1–1.5 mm long; pubescent. Floret callus pubescent.

GLUMES Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate, or oblong; 7–10 mm long; coriaceous; without keels; 5–7 -veined. Lower glume lateral veins prominent. Lower glume surface asperulous; rough on veins. Lower glume apex acuminate; muticous, or mucronate. Upper glume lanceolate, or oblong; 8–12 mm long; coriaceous; without keels; 5–7 -veined. Upper glume surface asperulous; rough on veins. Upper glume apex acuminate; muticous, or mucronate.

FLORETS Fertile lemma lanceolate, or oblong; 9–10 mm long; coriaceous; without keel; 5 -veined. Lemma surface scabrous; rough on veins. Lemma margins pubescent; hairy below. Lemma apex awned; 1 -awned. Principal lemma awn straight, or curved; 14–22 mm long overall. Palea 1 length of lemma; 2 -veined. Palea surface puberulous; hairy on back; hairy above. Palea apex emarginate, or truncate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Lodicules 2; membranous. Anthers 3; 2 mm long. 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.