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Descriptions

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

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

Coelorachis cancellata

HABIT Perennial; caespitose. Culms slender; 50–90 cm long; wiry. Culm-nodes pubescent. Leaf-sheaths glabrous on surface; outer margin hairy. Ligule an eciliate membrane. Leaf-blades 14–28 cm long; 4–8 mm wide. Leaf-blade surface pubescent; hairy adaxially. Leaf-blade apex acute.

INFLORESCENCE Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; exserted. Spatheole linear.

Racemes 1; single; smoothly terete; 3 cm long. Rhachis fragile at the nodes; angular; 2 mm wide; glabrous on surface. Rhachis internodes cuneate; 3 mm long. Rhachis internode tip transverse; crateriform; with simple rim.

Spikelets appressed; in pairs. Fertile spikelets sessile; 1 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels oblong; flattened; 3 mm long; tip cupuliform.

STERILE SPIKELETS Companion sterile spikelets rudimentary; comprising 2 subequal glumes without lemmas; lanceolate; 1.4 mm long; shorter than fertile; persistent. Companion sterile spikelet glumes winged on keels.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 2.6 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus base truncate; with central peg; attached transversely.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume ovate; asymmetrical; 1 length of spikelet; indurate; 2-keeled; winged on keel; winged narrowly; winged above; 5 -veined. Lower glume primary vein scaberulous. Lower glume surface cancellate. Lower glume apex acute. Upper glume oblong; membranous; 1-keeled; winged on keel; winged above; 3 -veined. Upper glume margins ciliate.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret oblong; 2.2 mm long; hyaline; 2 -veined. Fertile lemma ovate; 2.2 mm long; hyaline; without keel; 0 -veined.

FLOWER Anthers 3; 1.2 mm long.

DISTRIBUTION Asia-tropical: Indo-China and Malesia.

NOTES Andropogoneae. Gilliland.

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