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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 velutina

HABIT Perennial; caespitose. Culms erect; 40–80 cm long. Culm-internodes distally pruinose. Culm-nodes pubescent. Leaf-sheaths tight; 10–17 cm long; striately veined; pilose; with tubercle-based hairs. Ligule an eciliate membrane; 1–2 mm long. Leaf-blades linear, or lanceolate; 10–20 cm long; 7–12 mm wide. Leaf-blade surface pubescent, or pilose; hairy on both sides; with tubercle-based hairs. Leaf-blade margins scabrous.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–8; digitate; straight; unilateral; 8–16 cm long. Rhachis subterete; glabrous on margins. Spikelet packing crowded; regular; 2 -rowed. Rhachis internodes (2.5–)4–6 mm long.

Spikelets appressed; solitary. Fertile spikelets pedicelled. Pedicels cuneate; flattened; 0.5–1 mm long; glabrous.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; (4.5–)6–7 mm long; 0.8–1 mm wide; falling entire. Spikelet callus pubescent; base truncate.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume elliptic; 4.5–6.5 mm long; 1 length of spikelet; coriaceous; 1-keeled; wingless. Lower glume primary vein scabrous; ciliate. Lower glume margins ciliate. Lower glume apex acuminate. Upper glume elliptic; 4.5–6.5 mm long; coriaceous; 1-keeled; wingless. Upper glume primary vein scabrous; ciliate. Upper glume margins ciliate. Upper glume apex acuminate.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 3–4 mm long; hyaline; ciliate on margins; fringed above. Fertile lemma elliptic, or oblong; 3.5–5 mm long; without keel. Lemma apex awned; 1 -awned. Principal lemma awn geniculate; 8–12 mm long overall; with twisted column. Column of lemma awn 2.5–4 mm long.

FLOWER Anthers 2; 3.5 mm long.

DISTRIBUTION Asia-tropical: Indo-China and Malesia.

NOTES Andropogoneae. Atchara Teerawa. et al 2014.

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