Stipa longiplumosa

HABIT Perennial; caespitose; clumped densely. Culms 30–40 cm long. Culm-internodes antrorsely scabrous; distally pubescent. Leaf-sheaths antrorsely scabrous; glabrous on surface. Ligule a ciliolate membrane. Leaf-blades filiform; involute; 15–20 cm long; 0.5–1 mm wide. Leaf-blade surface ribbed; scabrous.

INFLORESCENCE Inflorescence a panicle; subtended by an inflated leaf-sheath; embraced at base by subtending leaf.

Panicle contracted; linear; 10 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 60–85 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 2 mm long; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; much thinner above; without keels. Lower glume apex acuminate. Upper glume lanceolate; 60–85 mm long; membranous; much thinner above; without keels. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 13–14 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy below; hairy in lines. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 200–230 mm long overall; with twisted column; limb plumose; with 9–11 mm long hairs. Column of lemma awn 40–50 mm long. Palea without keels.

FLOWER Anthers 3. Stigmas 2. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Stipeae. Fl USSR 1995.

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