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Descriptions

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

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

Dimeria balakrishnaniana

HABIT Annual. Culms erect; slender; 12–25 cm long. Culm-nodes bearded. Leaf-sheaths 2–3.5 cm long; keeled; pubescent. Ligule a ciliolate membrane; 1 mm long. Leaf-blades linear, or lanceolate; 4–6.7 cm long; 2–5 mm wide. Leaf-blade midrib conspicuous. Leaf-blade surface pubescent. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1(–2); single; unilateral; 2–4 cm long. Rhachis flattened; 1.5 mm wide; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels reduced to a stump; flattened.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or ovate; laterally compressed; compressed strongly; 4–5 mm long; falling entire. Spikelet callus pilose; base obtuse. Spikelet callus hairs 1–1.5 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate, or oblong; 4–4.5 mm long; 0.9 length of spikelet; chartaceous; 1-keeled. Lower glume primary vein ciliate. Lower glume apex acuminate. Upper glume lanceolate, or ovate; 4.5–5 mm long; 1 length of spikelet; coriaceous; 1-keeled; winged on keel. Upper glume surface asperulous; rough above. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate, or elliptic; 2–2.5 mm long; hyaline; 1 -veined; with obscure midvein; without lateral veins; ciliate on margins; fringed above; acute. Fertile lemma oblong; 2.5–3 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 10–12 mm long overall; with twisted column. Column of lemma awn 3–4 mm long; glabrous.

FLOWER Anthers 2; 1–1.5 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Ravikumar 2001.

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