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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 eradii

HABIT Annual; caespitose. Culms slender; 20–40 cm long; 0.3 mm diam. Culm-internodes distally glabrous. Culm-nodes pubescent. Leaves mostly basal. Leaf-sheaths 3–7 cm long; keeled; glabrous on surface, or pilose; with tubercle-based hairs. Ligule a ciliolate membrane; 0.5–0.75 mm long. Leaf-blades 5–9 cm long; 2–4 mm wide. Leaf-blade surface pilose; sparsely hairy; hairy on both sides; with tubercle-based hairs. Leaf-blade margins tuberculate-ciliate. Leaf-blade apex acute, or acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1–3; single, or paired, or digitate; flexuous; unilateral; 5–10 cm long. Rhachis broadly winged; 0.6–1 mm wide; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.3 mm long.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; laterally compressed; compressed strongly; 3–4.5 mm long; falling entire. Spikelet callus square; 0.25 mm long; pubescent; base obtuse. Spikelet callus hairs 0.5–0.75 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic, or oblong; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged narrowly; winged all along. Lower glume primary vein scaberulous; ciliate. Lower glume surface asperulous. Lower glume apex acuminate. Upper glume lanceolate, or oblong; 1 length of spikelet; coriaceous; 1-keeled; winged on keel; winged above. Upper glume surface asperulous; pilose. Upper glume margins ciliate. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 1 mm long.

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; fringed above; acute. Fertile lemma oblanceolate; 2 mm long; without keel. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 6.5–7.5 mm long overall; with twisted column. Column of lemma awn 2.5 mm long. Palea 0.4 mm long.

FLOWER Lodicules 2; cuneate. Anthers 2; 1.5–1.75 mm long.

FRUIT Caryopsis with adherent pericarp; oblong; 1–1.25 mm long.

DISTRIBUTION Asia-tropical: India.

NOTES Andropogoneae. Ravi 2006.

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