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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.
Leymus flexilis
HABIT Perennial; caespitose. Rhizomes short. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms 30–70 cm long. Culm-internodes smooth. Ligule an eciliate membrane. Leaf-blades involute; 1–3 mm wide; coriaceous; stiff; glaucous. Leaf-blade surface scaberulous; rough adaxially.
INFLORESCENCE Inflorescence composed of racemes. Peduncle smooth.
Racemes 1; single; linear; bilateral; 4–7 cm long; 7–9 mm wide. Rhachis pubescent on margins. Spikelet packing broadside to rhachis; crowded. Rhachis internodes linear.
Spikelets appressed; in pairs. Fertile spikelets sessile; 2 in the cluster.
FERTILE SPIKELETS Spikelets comprising 2–3 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 11–14 mm long; breaking up at maturity; disarticulating below each fertile floret.
GLUMES Glumes collateral; persistent; similar; shorter than spikelet. Lower glume subulate; 1 length of upper glume; coriaceous; 1 -veined. Lower glume lateral veins absent. Lower glume surface scabrous. Upper glume subulate; 7–10 mm long; 1–1.1 length of adjacent fertile lemma; coriaceous; 1 -veined. Upper glume lateral veins absent. Upper glume surface scabrous.
FLORETS Fertile lemma lanceolate; 6–10 mm long; coriaceous; without keel; 5 -veined. Lemma apex acuminate; awned; 1 -awned. Principal lemma awn 1–2 mm long overall. Palea 2 -veined. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.
DISTRIBUTION Asia-temperate: Soviet Middle Asia.
NOTES Triticeae. Fl USSR 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.