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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 woodrowii

HABIT Annual. Culms erect, or geniculately ascending; 5–15 cm long. Culm-nodes pubescent. Leaf-sheaths longer than adjacent culm internode. Ligule a ciliolate membrane; 1–1.5 mm long. Leaf-blades 3–7 cm long; 1–3 mm wide.

INFLORESCENCE Inflorescence composed of racemes; deciduous as a whole; subtended by an inflated leaf-sheath.

Racemes 2; paired; incurved, or watch-spring spiralled; unilateral; 0.7–2 cm long. Rhachis flattened; glabrous on margins. Spikelet packing lax; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; ciliate; hairy at tip.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 3–4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus square; 0.5 mm long; pilose.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; 1-keeled; wingless; 3 -veined. Lower glume primary vein eciliate. Lower glume surface glabrous, or pubescent (sparsely). Lower glume apex obtuse. Upper glume oblong; coriaceous; with hyaline margins; 1-keeled; winged on keel; winged near apex; 3 -veined. Upper glume primary vein scabrous; eciliate. Upper glume surface glabrous, or pubescent (sparsely). Upper glume apex obtuse.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2–2.5 mm long; hyaline. Fertile lemma ovate; 1.5 mm long; membranous; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; straight, or geniculate; 2–3 mm long overall; without a column, or with a straight or slightly twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Lodicules 2; cuneate; fleshy; truncate. Anthers 2; 1 mm long.

FRUIT Caryopsis with adherent pericarp; lanceolate; 2.5 mm long. Embryo 0.5 length of caryopsis. Hilum punctiform.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Bor.

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