GrassBase - The Online World Grass Flora


W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson

© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.

Dimeria chloridiformis

HABIT Perennial. Culms erect; 40–90 cm long. Leaf-sheaths glabrous on surface, or hirsute; outer margin glabrous, or hairy. Ligule a ciliolate membrane; 0.8 mm long. Leaf-blades 10–20 cm long; 4–8 mm wide. Leaf-blade surface pilose, or hirsute; densely hairy; hairy adaxially, or on both sides.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 3–6; digitate; unilateral; 9–15 cm long. Rhachis flattened; 0.7–1 mm wide; pilose on surface; ciliate on margins. Spikelet packing crowded; regular; 2 -rowed.

Spikelets appressed; solitary. Fertile spikelets sessile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; laterally compressed; compressed strongly; 4–5.5 mm long; falling entire. Spikelet callus 0.2 mm long; pubescent; base truncate, or obtuse.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume linear, or elliptic; 4 mm long; 0.9–1 length of spikelet; chartaceous; much thinner on margins; 1-keeled; 1 -veined. Lower glume primary vein ciliate. Lower glume lateral veins absent. Lower glume margins ciliate. Lower glume hairs 0.7–1 mm long. Lower glume apex acute, or acuminate. Upper glume elliptic, or oblong; 1 length of spikelet; chartaceous, or coriaceous; with hyaline margins; 1-keeled; wingless, or winged on keel. Upper glume primary vein ciliate. Upper glume margins ciliolate. Upper glume apex emarginate, or acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret linear, or lanceolate; 2.5–3.2 mm long; hyaline; ciliolate on margins. Fertile lemma elliptic, or obovate; 2.5–4.2 mm long; hyaline; without keel; 1 -veined. Lemma apex dentate; 2 -fid; awned; 1 -awned. Principal lemma awn from a sinus; geniculate; 10–17 mm long overall; with twisted column. Column of lemma awn glabrous. Palea absent or minute.

FLOWER Anthers 2; 1.5–2.2 mm long.

DISTRIBUTION Asia-tropical: Malesia and Papuasia. Australasia: Australia. Pacific: northwestern.

NOTES Andropogoneae. WDC 2002.

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