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Descriptions

W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Stipa narynica

HABIT Perennial; caespitose; clumped densely. Culms 15–30 cm long; 2–3 -noded. Culm-internodes distally pubescent. Culm-nodes glabrous, or pubescent. Leaf-sheaths longer than adjacent culm internode; glabrous on surface; outer margin hairy. Ligule a ciliolate membrane; 0.1–0.6 mm long; truncate. Leaf-blades filiform; involute; 7–27 cm long; 0.4–0.7(–0.8) mm wide. Leaf-blade surface papillose; rough abaxially; pubescent; hairy adaxially.

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

Panicle contracted; linear; 5–10 cm long. Primary panicle branches 1–2 -nate; bearing 1–2 fertile spikelets on each lower branch.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 45–55 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident; 1.7–2.3 mm long; pilose; acute; with elliptic scar. Floret callus hairs 1.2–1.4 mm long.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 45–55(–62) mm long; 1.1 length of upper glume; membranous; without keels. Lower glume apex attenuate. Upper glume lanceolate; 41–52(–58) mm long; membranous; without keels. Upper glume primary vein scabrous. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate; subterete; (11.5–)12–14.2(–14.8) mm long; 0.7–1.1 mm wide; coriaceous; light green; without keel; 5 -veined. Lemma surface scabrous; rough above; pilose; hairy in lines. Lemma margins convolute; covering most of palea. Lemma apex entire, or dentate; 2 -fid; with lobes 0.2–0.8 mm long; without appendage; awned; 1 -awned. Principal lemma awn geniculate; (120–)140–180(–193) mm long overall; with (100–)125–167(–178) mm long limb; with twisted column; limb plumose; with (5.5–)6–8(–8.5) mm long hairs; glabrescent towards tip. Column of lemma awn (10–)14–19(–21) mm long; ciliate; hairy on upper part; with 2–6.5 mm long hairs. Palea 1 length of lemma; without keels. Palea surface pilose; hairy on back.

FLOWER Anthers 3; 3.5–4.5 mm long; yellow; anther tip smooth. Stigmas 2.

FRUIT Caryopsis with adherent pericarp; fusiform; 8–9 mm long.

DISTRIBUTION Asia-temperate: Soviet Middle Asia.

NOTES Stipeae. Nobis 2012.

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