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 isoldeae

HABIT Perennial; caespitose; clumped densely. Culms 30–40 cm long. Culm-nodes pubescent. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule an eciliate membrane; 0.5–1.5 mm long. Leaf-blades filiform; conduplicate; 15–30 cm long; 0.7–0.9 mm wide. Leaf-blade surface scabrous; rough adaxially, or on both sides.

INFLORESCENCE Inflorescence a panicle.

Panicle contracted; linear.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 50 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; curved; 3 mm long; pubescent; pungent.

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

FLORETS Fertile lemma elliptic; subterete; 10–11 mm long; coriaceous; without keel. Lemma surface pubescent; hairy below; with conspicuous apical hairs. Lemma margins convolute; covering most of palea. Lemma hairs 3–4 mm long. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 150 mm long overall; with twisted column; limb plumose; with 4 mm long hairs. Column of lemma awn 15–25 mm long; pubescent; with 0.5–2 mm long hairs. Palea 2 -veined; without keels.

FLOWER Anthers 3.

DISTRIBUTION Europe: southeastern.

NOTES Stipeae. Scholz 2005.

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