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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 jainii

HABIT Annual. Culms erect; 10–20 cm long. Culm-nodes glabrous. Leaf-sheaths 1–5 cm long; mostly shorter than adjacent culm internode; keeled; hirsute; with tubercle-based hairs. Ligule a ciliolate membrane. Leaf-blades linear, or lanceolate; 2–8 cm long; 2–3 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade surface pilose; with tubercle-based hairs. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 2–3; paired, or digitate; unilateral; 2–4 cm long. Rhachis flattened; 0.5 mm wide; ciliate on margins. Spikelet packing crowded; 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 ovate; laterally compressed; compressed strongly; 3–3.5 mm long; falling entire. Spikelet callus pubescent; base obtuse. Spikelet callus hairs 0.5–1 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume linear, or lanceolate; 1 length of spikelet; coriaceous; 1-keeled. Lower glume margins ciliate. Lower glume hairs 0.5–2 mm long. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged all along. Upper glume primary vein ciliate. Upper glume margins ciliolate. Upper glume hairs 1–2 mm long. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1.5–2 mm long; hyaline; 1 -veined; without lateral veins; ciliolate on margins. Fertile lemma elliptic; 1.75–2 mm long; 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 1 mm long. Palea absent or minute.

FLOWER Lodicules 2; 0.4 mm long. Anthers 2; 0.5 mm long.

FRUIT Caryopsis with adherent pericarp.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Sreekumar & Nair 2006.

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