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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 kerrii

HABIT Perennial. Culms erect; 100–120 cm long. Culm-nodes pubescent. Leaf-sheaths 6–9 cm long; pubescent. Ligule a ciliolate membrane; 0.6 mm long. Leaf-blades linear, or lanceolate; 10–20 cm long; 3–4 mm wide, or 5 mm wide. Leaf-blade surface pubescent; densely hairy; hairy on both sides. Leaf-blade margins tuberculate-ciliate.

INFLORESCENCE Inflorescence composed of racemes. Peduncle hirsute above.

Racemes 2–3; paired, or digitate; unilateral; 8–16 cm long. Rhachis narrowly winged; flattened; 0.6–0.7 mm wide; scaberulous on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels clavate; flattened; 0.8–1.2 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong, or ovate; laterally compressed; compressed strongly; 5–6 mm long; 1.8–2 mm wide; falling entire. Spikelet callus pubescent; base obtuse. Spikelet callus hairs 0.3–0.5 mm long.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume oblong; 5–5.5 mm long; 1 length of spikelet; chartaceous; 1-keeled. Lower glume primary vein ciliate. Lower glume margins ciliate. Lower glume apex acuminate. Upper glume elliptic, or oblong; 5.5–6 length of adjacent fertile lemma; 1 length of spikelet; chartaceous, or coriaceous; 1-keeled; winged on keel; winged all along. Upper glume primary vein ciliate. Upper glume surface rugose (on wing). Upper glume margins ciliate. Upper glume apex acute, or acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 2.5–3 mm long; hyaline; ciliate on margins; fringed above. Fertile lemma elliptic, or oblong; 4 mm long; hyaline; without keel. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 12–15 mm long overall; with twisted column. Column of lemma awn 2–3 mm long; glabrous. Palea absent or minute.

FLOWER Anthers 2; 1.8–2 mm long.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Andropogoneae. Teer. & Sun 2012.

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