Stipa okmirii

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms 70–85 cm long. Culm-internodes distally pubescent. Leaf-sheaths scaberulous. Ligule a ciliolate membrane; 1–3 mm long; pubescent on abaxial surface. Leaf-blades filiform; convolute; 0.3–0.4 mm wide. Leaf-blade surface scabrous; rough abaxially; pubescent; densely hairy; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle open; elliptic; 25 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 60–70 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2.5 mm long; pubescent; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 60–70 mm long; 1 length of upper glume; membranous; without keels. Lower glume apex attenuate. Upper glume lanceolate; 60–70 mm long; membranous; without keels. Upper glume apex attenuate.

FLORETS Fertile lemma elliptic; subterete; 12–13 mm long; coriaceous; without keel. Lemma surface pubescent; hairy in lines (7 lines). Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 210–230 mm long overall; with twisted column; limb plumose; with 5–6 mm long hairs. Column of lemma awn scabrous. Palea without keels.

FLOWER Anthers 3.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Stipeae. Kotuchov 2006.

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