Stipa pavlovii

HABIT Perennial; caespitose. Butt sheaths persistent and investing base of culm; with compacted dead sheaths. Culms 60–70 cm long. Culm-internodes smooth; distally glabrous. Leaf-sheaths glabrous on surface. Ligule a ciliolate membrane; 1.4–3 mm long; 0.3–1.2 mm long on basal shoots; pubescent on abaxial surface. Leaf-blades filiform; conduplicate; 0.3–0.5 mm wide. Leaf-blade surface smooth, or scaberulous; rough abaxially; puberulous; hairy adaxially.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear; 11–15 cm long.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 25–27 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2–2.2 mm long; pubescent; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; membranous; without keels. Lower glume apex attenuate. Upper glume lanceolate; 25–27 mm long; membranous; without keels. Upper glume apex attenuate.

FLORETS Fertile lemma elliptic; subterete; 8.5–9.5 mm long; coriaceous; without keel. Lemma surface pubescent. Lemma margins convolute; covering most of palea. Lemma apex surmounted by a ring of hairs; awned; 1 -awned. Principal lemma awn bigeniculate; 90–110 mm long overall; with twisted column; limb puberulous; with 0.4–0.6 mm long hairs. Column of lemma awn pubescent; hairy on upper part. Palea without keels.

FLOWER Anthers 3; 4–5 mm long.

DISTRIBUTION Asia-temperate: Siberia.

NOTES Stipeae. Kotuchov 2006.

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