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Descriptions

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

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

Anthephora nigritana

HABIT Perennial; caespitose. Rhizomes short. Butt sheaths villous. Culms erect, or geniculately ascending; 50–150 cm long. Leaf-sheath auricles absent, or erect. Ligule an eciliate membrane; 1–7 mm long. Leaf-blades 10–40 cm long; 3–8 mm wide.

INFLORESCENCE Inflorescence a panicle.

Panicle spiciform; linear; 10–24 cm long. Primary panicle branches accrescent to a central axis; with sessile scars on axis. Panicle axis angular; scaberulous; bearing deciduous spikelet clusters.

Spikelets subtended by an involucre. Fertile spikelets sessile; 6–9 in the cluster. Companion sterile spikelets sessile; 6–9 in the cluster. Involucre composed of imperfect spikelets; oblong; 4–6 mm long; base obtuse; base pubescent.

STERILE SPIKELETS Companion sterile spikelets represented by single glumes; elliptic; 4–6 mm long; as long as fertile; deciduous with the fertile. Companion sterile spikelet glumes free; coriaceous; thinner on margins; 3–7 -veined; pubescent; acute; muticous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 4–6 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes one the lower absent or obscure; reaching apex of florets; thinner than fertile lemma. Upper glume subulate; 1 length of spikelet. Upper glume margins ciliolate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1 length of spikelet; membranous; 5–7 -veined; scaberulous; glabrous; ciliolate on margins; bearing hairs 0.2–0.5 mm long; obtuse. Fertile lemma lanceolate; 4–6 mm long; cartilaginous; much thinner on margins; without keel; 3 -veined. Lemma margins flat; covering most of palea. Lemma apex obtuse, or acute. Palea cartilaginous; 1-keeled.

FLOWER Anthers 3; 1.5–3 mm long.

DISTRIBUTION Africa: west tropical, northeast tropical, and east tropical. Asia-temperate: Arabia.

NOTES Paniceae. FTEA.

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