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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 namboodiriana
HABIT Perennial; culms solitary, or caespitose. Stolons present. Culms 25–50 cm long; rooting from lower nodes. Culm-internodes smooth. Lateral branches lacking, or sparse. Leaf-sheaths 5–10 cm long; keeled; striately veined; pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 1 mm long; truncate. Leaf-blades erect; 20 cm long; 7 mm wide; stiff. Leaf-blade surface pilose; densely hairy; hairy on both sides; with tubercle-based hairs. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 2; paired; straight; unilateral; 8 cm long. Rhachis broadly winged; 1.5 mm wide; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.
Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.25–0.5 mm long; ciliate.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic, or oblong; laterally compressed; compressed strongly; 4.5–5.75 mm long; falling entire. Spikelet callus square; 0.5 mm long; pubescent; base obtuse. Spikelet callus hairs 0.75 mm long.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic, or oblong; 1 length of spikelet; coriaceous; light brown; 1-keeled; winged on keel; winged broadly; winged all along. Lower glume primary vein ciliolate. Lower glume surface asperulous. Lower glume margins eciliate, or ciliolate. Upper glume elliptic, or oblong; 1 length of spikelet; coriaceous; light brown; 1-keeled; winged on keel; winged all along. Upper glume surface asperulous. Upper glume margins ciliate. Upper glume apex acuminate.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.25–3.25 mm long; hyaline; 2 -veined; ciliolate on margins; fringed above; acute. Fertile lemma oblanceolate; 3.4–4 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 2–3.5 mm long. Palea 0.5 mm long.
FLOWER Lodicules 2; cuneate; 0.3 mm long. Anthers 2; 2–2.5 mm long.
FRUIT Caryopsis with adherent pericarp; oblong; 2 mm long.
DISTRIBUTION Asia-tropical: India.
NOTES Andropogoneae. Ravi & Mohanan 2006.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
