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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 copeana

HABIT Perennial; caespitose. Stolons present. Butt sheaths glabrous, or pilose. Culms slender; 20–45 cm long. Culm-nodes bearded. Leaf-sheaths mostly shorter than adjacent culm internode; glabrous on surface. Ligule a ciliolate membrane. Leaf-blades 20–40 cm long; 1–2 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy adaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 2; paired; appressed; unilateral; 8–10 cm long. Rhachis narrowly winged; angular; 0.25–0.5 mm wide; scaberulous on margins; glabrous on margins. Spikelet packing crowded.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblanceolate; laterally compressed; compressed strongly; 3.5–4.5 mm long; falling entire. Spikelet callus cuneate; 0.25–0.5 mm long; pubescent.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 3–4 mm long; 0.8–0.9 length of spikelet; coriaceous; 1-keeled. Lower glume surface scabrous. Lower glume apex acute. Upper glume elliptic; 3.5–4.5 mm long; 1 length of spikelet; coriaceous; with hyaline margins; without keels; wingless. Upper glume surface scabrous; villous. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.5 mm long; hyaline; 1 -veined; without lateral veins; ciliolate on margins; fringed above. Fertile lemma oblong; 3–3.5 mm long; hyaline; 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 glabrous. Palea absent or minute.

FLOWER Anthers 2; 2 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; 2.25 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Gr Kerala 1997.

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