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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Elymus sylvaticus
HABIT Perennial; caespitose. Culms geniculately ascending; 80–120 cm long; 3 mm diam.; 4–5 -noded; with 0.66–0.75 of their length below uppermost node. Culm-internodes distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode; smooth; glabrous on surface. Ligule an eciliate membrane; 0.5 mm long; scarious; truncate. Leaf-blades 13–25 cm long; 6–9 mm wide. Leaf-blade surface scabrous; rough adaxially; glabrous. Leaf-blade margins scabrous. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1; single; bilateral; 7.5–8.5 cm long. Rhachis flattened; ciliate on margins. Spikelet packing broadside to rhachis; regular; 2 -rowed. Rhachis internodes 4–5 mm long.
Spikelets solitary. Fertile spikelets sessile.
STERILE SPIKELETS Basal sterile spikelets rudimentary; 1–3 in number.
FERTILE SPIKELETS Spikelets comprising 3 fertile florets; with diminished florets at the apex. Spikelets laterally compressed; 12–14 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes 1.5 mm long; pubescent. Floret callus pubescent.
GLUMES Glumes persistent; similar; subequal in width; shorter than spikelet. Lower glume lanceolate; 8–10 mm long; coriaceous; much thinner on margins; without keels; 3–5 -veined. Lower glume surface scabrous. Lower glume apex acute, or acuminate; muticous, or awned; 1 -awned. Lower glume awn 1–2 mm long. Upper glume lanceolate; 8–10 mm long; coriaceous; with membranous margins; without keels; 3–5 -veined. Upper glume surface scabrous. Upper glume apex acute, or acuminate; muticous, or awned; 1 -awned. Upper glume awn 1–2 mm long.
FLORETS Fertile lemma lanceolate; 9–10 mm long; coriaceous; much thinner on margins; without keel; 5 -veined. Lemma lateral veins obscure. Lemma surface puberulous. Lemma apex awned; 1 -awned. Principal lemma awn 1–3 mm long overall; 1 length of lemma. Palea 1 length of lemma; 2 -veined. Palea surface pubescent; hairy on back; hairy above. Palea apex emarginate. Apical sterile florets resembling fertile though underdeveloped.
FLOWER Lodicules 2; 1.8 mm long; membranous. Anthers 3; 2 mm long; yellow. Stigmas 2. Ovary pubescent on apex.
FRUIT Caryopsis with adherent pericarp; 3 mm long; dark brown; 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.
