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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 sreenarayanae

HABIT Annual. Culms 10–20 cm long. Culm-internodes smooth; distally glabrous. Culm-nodes glabrous. Leaf-sheaths 3–7 cm long; keeled; glabrous on surface. Ligule a ciliolate membrane; 1 mm long; obtuse. Leaf-blade base cuneate. Leaf-blades linear, or lanceolate; 3–7 cm long; 2–4 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1; single; flexuous; unilateral; 3–5 cm long. Rhachis broadly winged; 1–1.25 mm wide; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.75 mm long; ciliate.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 7 mm long; falling entire. Spikelet callus 0.5 mm long; bearded; base obtuse. Spikelet callus hairs 1.25 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic, or oblong; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged narrowly; winged above. Lower glume primary vein ciliate. Lower glume apex setaceously attenuate. Upper glume elliptic; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged all along. Upper glume primary vein ciliate. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 3 mm long; hyaline; 1 -veined; without lateral veins; ciliolate on margins. Fertile lemma elliptic; 3.5 mm long; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 16 mm long overall; with twisted column. Column of lemma awn 6 mm long. Palea 1 mm long. Palea surface pilose; hairy on margins.

FLOWER Lodicules 2. Anthers 2; 1.5 mm long.

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

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Ravi & Anilkumar 2006.

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