GrassBase - The Online World Grass Flora


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

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

Stipa adoxa

HABIT Perennial; caespitose; clumped densely. Culms 30–60 cm long; 3 -noded. Culm-internodes distally glabrous. Leaf-sheaths scaberulous; glabrous on surface. Ligule a ciliolate membrane; 3.5–4 mm long; acute. Leaf-blades filiform; conduplicate; 10–15 cm long; 1.4 mm wide. Leaf-blade surface scaberulous; rough abaxially; pilose; sparsely hairy; hairy adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle; comprising 5–7 fertile spikelets. Peduncle pubescent above.

Panicle open, or contracted; linear, or lanceolate; 10–12 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 30–50 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 1 length of upper glume; membranous; without keels. Lower glume apex acuminate. Upper glume lanceolate; 30–50 mm long; membranous; without keels. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 17–20 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy on veins; with conspicuous apical hairs. Lemma margins convolute; covering most of palea; pubescent. Lemma hairs 1–1.2 mm long. Lemma apex awned; 1 -awned. Principal lemma awn bigeniculate; 270–310 mm long overall; with twisted column; limb plumose; with 4–4.5 mm long hairs. Column of lemma awn ciliate; with 0.5–1.7 mm long hairs. Palea without keels.

FRUIT Hilum linear.

DISTRIBUTION Europe: eastern.

NOTES Stipeae. Klok. & Oss. 2006.

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