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Descriptions

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

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

Brachiaria burmanica

HABIT Annual. Culms decumbent; 20–40 cm long. Culm-nodes bearded. Leaf-sheaths hirsute; with tubercle-based hairs. Ligule a fringe of hairs. Leaf-blade base broadly rounded. Leaf-blades lanceolate; 3–5 cm long; 8–10 mm wide. Leaf-blade surface pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins cartilaginous. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous, or pubescent above.

Racemes 3–5; borne along a central axis; unilateral; 2–5 cm long. Central inflorescence axis 0.5–5 cm long. Rhachis broadly winged; with sharp-edged midrib. Spikelet packing adaxial; regular; 1 -rowed.

Spikelets solitary. Fertile spikelets pedicelled. Pedicels oblong; 1 mm long; 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; 3.5 mm long; 1.5–1.75 mm wide; falling entire. Rhachilla internodes elongated between glumes.

GLUMES Glumes dissimilar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; clasping; 2 mm long; 0.5 length of spikelet; membranous; without keels; 7 -veined. Lower glume surface pubescent; hairy generally. Lower glume apex acute. Upper glume elliptic; 3.5 mm long; 1 length of spikelet; membranous; without keels; 7 -veined. Upper glume surface pilose; hairy generally; with tubercle-based hairs. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; elliptic; 1 length of spikelet; membranous; 5 -veined; pilose; hairy generally; with tubercle-based hairs; acute. Fertile lemma elliptic; 3 mm long; indurate; without keel; 3 -veined. Lemma surface rugulose. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate; without keels.

FLOWER Anthers 3; 1.5 mm long.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Paniceae. Bor.

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