Dimeria keenanii

HABIT Annual. Culms erect; 20–40 cm long. Culm-nodes pubescent. Leaf-sheaths loose; pilose. Ligule a ciliolate membrane; 0.5 mm long. Leaf-blades 4–9 cm long; 2–4 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy on both sides. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; unilateral; 3–4 cm long. Rhachis flattened; ciliate on margins. Spikelet packing regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.5 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 5.5 mm long; falling entire. Spikelet callus pubescent; base obtuse.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 4.5 mm long; 0.8 length of spikelet; coriaceous; 1-keeled; winged on keel; winged narrowly; winged all along; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume apex acuminate. Upper glume oblong; 5.5 mm long; 1 length of spikelet; coriaceous; with hyaline margins; 1-keeled; winged on keel; winged all along. Upper glume primary vein ciliate. Upper glume apex acute.

FLORETS Basal sterile florets with vestigial lower floret. Fertile lemma elliptic; 3 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 9–12 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 2.

DISTRIBUTION Asia-tropical: Indo-China and Papuasia.

NOTES Andropogoneae. Bor 1994.

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