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.

Agropyron krylovianum

HABIT Perennial; caespitose; clumped loosely. Rhizomes elongated. Culms 40–100 cm long. Culm-internodes distally glabrous. Leaf-sheaths pilose; with reflexed hairs. Ligule an eciliate membrane. Leaf-blades 10–20 cm long; 1.2–5 mm wide. Leaf-blade surface scaberulous; rough adaxially; glabrous.

INFLORESCENCE Inflorescence composed of racemes. Peduncle scaberulous above.

Racemes 1; single; linear, or oblong; bilateral; 8–12 cm long; 7–14 mm wide. Rhachis pubescent on surface. Spikelet packing broadside to rhachis; crowded. Rhachis internodes oblong.

Spikelets ascending; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 5–9 fertile florets; with diminished florets at the apex. Spikelets oblong; laterally compressed; 8–15 mm long; breaking up at maturity; disarticulating below each fertile floret.

GLUMES Glumes persistent; similar; shorter than spikelet; firmer than fertile lemma. Lower glume lanceolate; 4–8 mm long; 1 length of upper glume; coriaceous; 1-keeled; keeled all along; 3–4 -veined. Lower glume primary vein ciliate. Lower glume apex acuminate. Upper glume lanceolate; 4–8 mm long; 0.75–1 length of adjacent fertile lemma; coriaceous; 1-keeled; keeled all along; 3–4 -veined. Upper glume primary vein ciliate. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; 7–9 mm long; chartaceous; keeled; 5 -veined. Lemma surface glabrous, or pubescent. Lemma apex acute; awned; 1 -awned. Principal lemma awn 0.5–1.5 mm long overall. Palea 1 length of lemma. Palea keels ciliate. Apical sterile florets resembling fertile though underdeveloped.

FLOWER Anthers 3; 4 mm long. Ovary with a fleshy appendage below style insertion; pubescent on apex.

FRUIT Caryopsis with adherent pericarp; hairy at apex; apex fleshy. Hilum linear. Disseminule comprising a floret.

DISTRIBUTION Asia-temperate: Siberia and Soviet Middle Asia.

NOTES Triticeae. Fl USSR 1996.

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