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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Brachiaria mutica
HABIT Perennial. Culms rambling; 25–125 cm long; rooting from lower nodes. Ligule a fringe of hairs. Leaf-blades 6–30 cm long; 3–15 mm wide.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 5–20; borne along a central axis; unilateral; 2–10 cm long; simple, or secondarily branched. Central inflorescence axis 7–20 cm long. Rhachis broadly winged; 0.5–1 mm wide; scabrous on margins; glabrous on margins. Spikelet packing irregular.
Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels bearing a few hairs.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; compressed slightly; acute; 2.5–3.5 mm long; falling entire. Rhachilla internodes brief up to lowest fertile floret.
GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.25–0.33 length of spikelet; membranous; without keels; 3–5 -veined. Lower glume apex acute. Upper glume oblong; 1 length of spikelet; membranous; without keels; 5–7 -veined. Upper glume apex acute.
FLORETS Basal sterile florets male; with palea. Lemma of lower sterile floret similar to upper glume; oblong; 1 length of spikelet; membranous; 5 -veined; acute. Fertile lemma elliptic; 2–3 mm long; indurate; without keel. Lemma surface rugulose. Lemma margins involute. Lemma apex obtuse; muticous, or mucronate. Palea involute; indurate; without keels. Palea surface rugose.
DISTRIBUTION Africa: north, Macaronesia, west tropical, west-central tropical, northeast tropical, east tropical, southern tropical, and western Indian ocean. Asia-temperate: western Asia, Arabia, China, and eastern Asia. Asia-tropical: India, Indo-China, Malesia, and Papuasia. Australasia: Australia and New Zealand. Pacific: southwestern, south-central, northwestern, and north-central. North America: south-central USA and Mexico. South America: Mesoamericana, Caribbean, northern South America, western South America, Brazil, and southern South America.
NOTES Paniceae. FTEA.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
