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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.
HABIT Perennial. Rhizomes elongated. Culms erect; reed-like; 300–1000 cm long; 20–80 mm diam. Culm-internodes solid. Leaves cauline; distichous. Ligule a ciliolate membrane. Collar with external ligule. Leaf-blades 40–200 cm long; 20–80 mm wide. Leaf-blade margins scabrous.
INFLORESCENCE Dioecious. Inflorescence a panicle.
Panicle open; ovate; 100–150 cm long. Primary panicle branches profusely divided.
Spikelets solitary. Fertile spikelets pedicelled.
FERTILE SPIKELETS Spikelets comprising 2 fertile florets; without rhachilla extension. Spikelets cuneate; laterally compressed; 7–10 mm long; breaking up at maturity; disarticulating below each fertile floret. Floret callus elongated; 0.5 mm long; glabrous, or pilose.
GLUMES Glumes deciduous; dissimilar; exceeding apex of florets; similar to fertile lemma in texture; recurved at apex (upper glume). Lower glume linear; 3 mm long; 0.3–0.5 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume linear; 7–10 mm long; 1.5–2 length of adjacent fertile lemma; membranous; without keels; 3 -veined. Upper glume apex caudate.
FLORETS Fertile florets recurved at tip; female. Fertile lemma elliptic; 5 mm long; membranous; without keel; 3 -veined. Lemma surface plumose; hairy below. Lemma margins involute. Lemma apex caudate. Palea 0.25 length of lemma; 2 -veined.
FLOWER Lodicules 2. Anthers 2; 1.5–2 mm long. Stigmas 2.
MALE Male inflorescence similar to female; a panicle. Male spikelets distinct from female (glabrous); 3 mm long. Male spikelet glumes 2.
DISTRIBUTION Africa: west tropical. North America: Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America.
NOTES Arundineae. Pohl.
Please cite this publication as detailed in How to Cite Version: 16th November 2012.