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Descriptions

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

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

Nassella curamalalensis

HABIT Perennial; caespitose. Culms erect; slender; 15–70 cm long. Culm-internodes distally glabrous. Leaf-sheaths glabrous on surface. Leaf-sheath oral hairs lacking. Ligule an eciliate membrane; 0.5–1 mm long; obtuse. Leaf-blades filiform; conduplicate; 15–20 cm long; 0.3–0.4 mm wide. Leaf-blade surface scaberulous. Leaf-blade apex acute; pungent.

INFLORESCENCE Inflorescence a panicle; terminal, or terminal and axillary.

Panicle open; linear; equilateral; 5–10 cm long; bearing few spikelets.

Spikelets solitary. Fertile spikelets pedicelled.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets lanceolate; laterally compressed; 6–12 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus evident, or elongated; curved; 0.6–1.2 mm long; pubescent; obtuse.

GLUMES Glumes persistent; similar; exceeding apex of florets; thinner than fertile lemma. Lower glume lanceolate; 6–12 mm long; 1 length of upper glume; hyaline; purple; without keels; 3 -veined. Lower glume surface scabrous; rough on veins. Lower glume apex setaceously attenuate. Upper glume lanceolate; 6–12 mm long; 2–2.5 length of adjacent fertile lemma; hyaline; purple; without keels; 3 -veined. Upper glume surface scabrous; rough on veins. Upper glume apex setaceously attenuate.

FLORETS Fertile lemma linear; laterally compressed; gibbous; 3.5–5 mm long; chartaceous, or coriaceous; without keel; 5 -veined. Lemma surface papillose; glabrous. Lemma margins convolute; covering most of palea. Lemma apex awned; 1 -awned. Principal lemma awn eccentric; bigeniculate; 30–50 mm long overall; with 23–30 mm long limb; with twisted column. Column of lemma awn 10–15 mm long; glabrous. Palea 1–1.9 mm long; 0 -veined; without keels.

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

FRUIT Caryopsis with adherent pericarp; fusiform. Hilum linear.

DISTRIBUTION South America: southern South America.

NOTES Stipeae. Torres 1994.

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