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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 kollimalayana

HABIT Annual. Culms 10–20 cm long. Culm-nodes pubescent. Leaf-sheaths 1–5 cm long; keeled; pilose; with tubercle-based hairs. Ligule an eciliate membrane; 1 mm long. Leaf-blade base broadly rounded. Leaf-blades linear, or lanceolate; 2–6 cm long; 3–4 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade surface pilose; with tubercle-based hairs.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 2; paired; ascending; sinuous; unilateral; 2–3 cm long. Rhachis flattened; 0.75 mm wide; glabrous 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 lanceolate, or oblong; laterally compressed; compressed strongly; 4–4.5 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 oblong; 1 length of spikelet; coriaceous; 1-keeled. Lower glume surface scabrous. Lower glume apex acuminate. Upper glume elliptic, or oblong; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged near apex. Upper glume surface villous. 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; 2.5–3 mm long; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 8–10 mm long overall; with twisted column. Column of lemma awn 3 mm long. Palea absent or minute.

FLOWER Lodicules 2. Anthers 2; 0.5–0.75 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; 2 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Mohanan & Rao.

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