Dimeria thwaitesii

HABIT Annual. Culms erect; 10–30 cm long. Ligule an eciliate membrane. Leaf-blades 1–10 cm long; 1–3 mm wide.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; straight; unilateral; 2–6 cm long. Rhachis flattened; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 3.5–5 mm long; falling entire. Spikelet callus pubescent; base obtuse.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 1 length of spikelet; coriaceous; 1-keeled; wingless; 3 -veined. Lower glume primary vein ciliate. Lower glume apex acute, or acuminate. Upper glume elliptic; coriaceous; with hyaline margins; 1-keeled; winged on keel; winged near apex; 3 -veined. Upper glume primary vein ciliate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 0.5–1 mm long.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; hyaline. Fertile lemma elliptic; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6–10 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 2.

DISTRIBUTION Asia-tropical: India and Indo-China.

NOTES Andropogoneae. WDC.

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