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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 fontanesii

HABIT Perennial; caespitose; clumped densely. Culms erect; 40–60 cm long. Culm-internodes antrorsely scabrous. Leaf-sheaths smooth, or scaberulous; glabrous on surface. Ligule an eciliate membrane; 5–10 mm long; acute. Leaf-blades filiform; conduplicate; 15–30 cm long; 0.4–0.8 mm wide. Leaf-blade venation with 7 secondary veins; with continuous uniform subepidermal sclerenchyma layer on the underside. Leaf-blade surface ribbed; scabrous; rough adaxially. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence a panicle.

Panicle open; ovate; 10–20 cm long; bearing few spikelets. Primary panicle branches 2 -nate. Panicle axis scabrous. Panicle branches scabrous.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 18–25 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 2 mm long; pubescent; pungent.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 18–25 mm long; 1 length of upper glume; membranous; without keels; 3 -veined. Lower glume apex attenuate. Upper glume lanceolate; 18–25 mm long; 1.8–2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex attenuate.

FLORETS Fertile lemma lanceolate; subterete; 10–13 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy above and at base. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn bigeniculate; 100–150 mm long overall; with twisted column; limb puberulous. Column of lemma awn pubescent. Palea 1 length of lemma; coriaceous; 2 -veined; without keels.

FLOWER Lodicules 3; 2 mm long. Anthers 3; 8–9 mm long; anther tip penicillate. Stigmas 3. Ovary glabrous.

FRUIT Caryopsis with adherent pericarp. Hilum linear.

DISTRIBUTION Europe: southeastern. Africa: north. Asia-temperate: western Asia.

NOTES Stipeae. Fl Afr N 1994.

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