Koeleria tzvelevii

HABIT Perennial; caespitose; clumped loosely. Butt sheaths persistent and investing base of culm; with compacted dead sheaths, or fibrous dead sheaths. Culms 30–40 cm long. Culm-internodes distally pilose. Ligule an eciliate membrane. Leaf-blades flat; 8–15 cm long; 1–1.5 mm wide; stiff. Leaf-blade surface smooth, or scaberulous; rough adaxially; glabrous.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; oblong; 6–7 cm long; 1 cm wide.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 2 fertile florets; with a barren rhachilla extension. Spikelets obovate; laterally compressed; 4–4.5 mm long; breaking up at maturity; disarticulating below each fertile floret. Rhachilla internodes pubescent.

GLUMES Glumes persistent; similar; shorter than spikelet, or reaching apex of florets; similar to fertile lemma in texture; shiny; gaping. Lower glume lanceolate; 3–3.5 mm long; 0.75 length of upper glume; membranous; 1-keeled; 1 -veined. Lower glume primary vein scaberulous. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume oblong; 4 mm long; 1 length of adjacent fertile lemma; membranous; 1-keeled. Upper glume primary vein scaberulous. Upper glume apex acuminate.

FLORETS Fertile lemma oblong; 3.5–4 mm long; membranous; shiny; keeled. Lemma surface pilose. Lemma apex acute; mucronate. Palea gaping.

FLOWER Anthers 3.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Aveneae. Vlassova 2006.

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