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 troctolepis

HABIT Perennial. Culms erect; 50–100 cm long. Culm-internodes glaucous; smooth. Ligule an eciliate membrane. Leaf-blades 10–20 cm long; 3–7 mm wide; glaucous. Leaf-blade surface scabrous; rough adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; ascending, or drooping; bilateral; 6–15 cm long. Rhachis flattened; scaberulous on margins. Spikelet packing broadside to rhachis. Rhachis internodes linear; 5–15 mm long. Rhachis internode tip flat.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 4–5 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 10–16 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes sparsely hairy.

GLUMES Glumes collateral; persistent; similar; shorter than spikelet. Lower glume oblong; 7–9 mm long; 1 length of upper glume; chartaceous; without keels; 5 -veined. Lower glume apex erose; truncate, or obtuse. Upper glume oblong; 7–9 mm long; 0.75 length of adjacent fertile lemma; chartaceous; without keels; 5 -veined. Upper glume apex erose; truncate, or obtuse.

FLORETS Fertile lemma elliptic, or oblong; 10–11 mm long; coriaceous; 5 -veined. Lemma apex emarginate; muticous. Palea keels scabrous. Apical sterile florets resembling fertile though underdeveloped.

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

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-temperate: Caucasus.

NOTES Triticeae. Fl Iran 1995.

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