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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Dimeria raizadae
HABIT Annual. Culms erect; 30–60 cm long. Culm-nodes glabrous. Leaf-sheaths 3–10 cm long; mostly shorter than adjacent culm internode; keeled; glabrous on surface, or pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 1 mm long. Leaf-blades linear, or lanceolate; 4–10 cm long; 2–4 mm wide. Leaf-blade midrib prominent beneath. Leaf-blade surface pilose; hairy on both sides; with simple hairs, or tubercle-based hairs. Leaf-blade margins ciliate.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 2; paired; unilateral; 6–10 cm long. Rhachis flattened; 0.75–1 mm wide; ciliate 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 ovate; laterally compressed; compressed strongly; 3–3.5 mm long; falling entire. Spikelet callus bearded; base obtuse. Spikelet callus hairs 1–1.5 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 primary vein ciliate. Lower glume margins ciliate. Lower glume apex acuminate. Upper glume lanceolate, or ovate; 1 length of spikelet; coriaceous; 1-keeled. Upper glume primary vein ciliate. Upper glume margins ciliate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 0.5–0.75 mm long.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1.75–2 mm long; hyaline; 1 -veined; without lateral veins; ciliolate on margins. Fertile lemma elliptic; 2–2.5 mm long; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6–10 mm long overall; with twisted column. Column of lemma awn 3 mm long. Palea absent or minute.
FLOWER Lodicules 2. Anthers 2; 1–2 mm long.
FRUIT Caryopsis with adherent pericarp.
DISTRIBUTION Asia-tropical: India.
NOTES Andropogoneae. Nair et al 2006.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
