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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 josephii
HABIT Annual; caespitose. Culms 15–30 cm long. Culm-nodes glabrous. Leaves mostly basal. Leaf-sheaths 4–8 cm long; keeled; pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 0.25 mm long; truncate, or obtuse. Leaf-blades linear, or lanceolate; 3–5 cm long; 2–4 mm wide. Leaf-blade margins tuberculate-ciliate. Leaf-blade apex acuminate.
INFLORESCENCE Inflorescence composed of racemes.
Racemes 1–2; single, or paired; unilateral; 3–5 cm long. Rhachis narrowly winged; flattened; 1 mm wide; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.
Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.25 mm long; ciliate.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 5–6 mm long; falling entire. Spikelet callus 0.5 mm long; pubescent; base obtuse.
GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 1 length of spikelet; coriaceous; 1-keeled. Lower glume primary vein ciliate. Lower glume surface pilose. Lower glume margins ciliate. Lower glume apex attenuate. Upper glume elliptic, or oblong; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged above. Upper glume primary vein ciliate. Upper glume surface pilose. Upper glume hairs 1–2 mm long. Upper glume apex attenuate.
FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2 mm long; hyaline; 1 -veined; without lateral veins; ciliolate on margins. Fertile lemma elliptic; 3–3.5 mm long; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 13–16 mm long overall; with twisted column. Column of lemma awn 4–6 mm long. Palea lanceolate; 0.75 mm long. Palea surface papillose.
FLOWER Lodicules 2; cuneate; 0.5 mm long; truncate. Anthers 2; 0.75–1 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.
