Coelorachis geminata

HABIT Perennial; caespitose. Culms 30–60 cm long. Culm-nodes pubescent. Leaf-sheaths 6–10 cm long; keeled; pubescent. Ligule an eciliate membrane. Leaf-blades 12–26 cm long; 5–10 mm wide. Leaf-blade surface pubescent; hairy on both sides. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes; terminal. Peduncle widened at apex.

Racemes 1; single; smoothly terete; 5–6 cm long. Rhachis fragile at the nodes; semiterete; glabrous on surface. Rhachis internodes cuneate; 2–4 mm long. Rhachis internode tip transverse; crateriform; with simple rim.

Spikelets sunken; in threes. Fertile spikelets sessile; 2 in the cluster. Companion sterile spikelets pedicelled; 1 in the cluster. Pedicels columnar; semiterete; 3.2 mm long; glabrous.

STERILE SPIKELETS Companion sterile spikelets rudimentary; comprising 2 unequal glumes without lemmas; ovate; 0.4 mm long; shorter than fertile; deciduous with the fertile.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; 3.4 mm long; falling entire; deciduous with accessory branch structures. Spikelet callus glabrous; 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; coriaceous; 2-keeled; winged on keel; winged narrowly; winged above. Lower glume surface smooth; pubescent. Lower glume apex acute. Upper glume oblong; membranous; 1-keeled; 3 -veined.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret oblong; 2.2 mm long; hyaline. Fertile lemma elliptic; 2.2 mm long; hyaline; without keel; 0 -veined. Palea 1.8 mm long.

DISTRIBUTION Asia-tropical: Malesia.

NOTES Andropogoneae. Gilliland 1994.

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