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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 nicorae

HABIT Perennial; caespitose. Culms 10–19 cm long; 2 -noded. Culm-nodes swollen; glabrous. Leaf-sheaths longer than adjacent culm internode; smooth; glabrous on surface. Leaf-sheath oral hairs pubescent. Ligule an eciliate membrane. Leaf-blades convolute; 0.4–0.5 mm wide. Leaf-blade surface glabrous. Leaf-blade apex acuminate; pungent.

INFLORESCENCE Inflorescence a panicle; comprising 9–12 fertile spikelets; subtended by an inflated leaf-sheath; embraced at base by subtending leaf.

Panicle open; linear; 3–7 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels 2–8 mm long; pubescent.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; subterete; 19–26 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 1.2–1.8 mm long; glabrous; acute.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume linear; 19–26 mm long; 1 length of upper glume; membranous; much thinner on margins; yellow; 1-keeled; 3 -veined. Lower glume primary vein ciliolate. Lower glume surface pubescent. Lower glume apex acuminate. Upper glume linear; 19–26 mm long; membranous; with hyaline margins; yellow; 1-keeled; 3 -veined. Upper glume primary vein ciliolate. Upper glume surface pubescent. Upper glume apex acuminate.

FLORETS Fertile lemma lanceolate; subterete; 7–8 mm long; coriaceous; without keel; 5 -veined. Lemma surface pubescent; hairy below; with conspicuous apical hairs. Lemma margins convolute; covering most of palea. Lemma hairs 3 mm long. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 20–50 mm long overall; with 19–20 mm long limb; with twisted column. Column of lemma awn 10–13 mm long; plumose. Palea 6–7 mm long; 0 -veined; without keels. Palea surface hirsute.

FRUIT Caryopsis with adherent pericarp; 4–4.5 mm long.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Roig 1997.

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