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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 czimganicus

HABIT Perennial; caespitose; clumped densely. Rhizomes short. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms geniculately ascending; 30–60 cm long. Ligule an eciliate membrane. Leaf-blades involute; 8–16 cm long; 2–3 mm wide; glaucous. Leaf-blade surface scabrous; rough adaxially; glabrous, or puberulous; hairy adaxially. Leaf-blade margins scabrous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; flexuous; bilateral; 6–9 cm long; bearing 4–9 fertile spikelets on each. Rhachis flattened; scabrous on margins. Spikelet packing broadside to rhachis; lax. Rhachis internodes linear; 10–12 mm long. Rhachis internode tip flat.

Spikelets solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–7 fertile florets; with diminished florets at the apex. Spikelets elliptic to oblong; laterally compressed; 12–15 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes collateral; persistent; similar; shorter than spikelet. Lower glume elliptic; 4–8 mm long; 1 length of upper glume; coriaceous; without keels; 3–5 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex acute; muticous, or mucronate. Upper glume elliptic; 4–8 mm long; 0.5–0.75 length of adjacent fertile lemma; coriaceous; without keels; 3–5 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex acute; muticous, or mucronate.

FLORETS Fertile lemma oblong; 9–10 mm long; coriaceous; 5 -veined. Lemma apex acute; awned; 1 -awned. Principal lemma awn recurved at base of limb; 20–30 mm long overall. 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: Soviet Middle Asia and China.

NOTES Triticeae. Fl Iran 1995.

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