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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 striata

HABIT Perennial. Culms slender; 100 cm long. Leaf-sheaths glabrous on surface, or pilose; with tubercle-based hairs. Ligule an eciliate membrane. Leaf-blades linear, or lanceolate; 60–120 cm long; 8–50 mm wide; stiff. Leaf-blade margins scabrous. Leaf-blade apex acuminate; filiform.

INFLORESCENCE Synflorescence compound; paniculate. Inflorescence composed of racemes; terminal and axillary; subtended by a spatheole; exserted. Spatheole linear; 5–8 cm long.

Racemes 1; single; smoothly terete; 2.5–5 cm long. Rhachis fragile at the nodes; angular; 1–1.2 mm wide; glabrous on surface. Rhachis internodes cuneate; 3.7–4.8 mm long; with the lower often bearing triads. 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 columnar; semiterete; tip cupuliform.

STERILE SPIKELETS Companion sterile spikelets rudimentary, or well-developed; comprising 2 subequal glumes without lemmas; lanceolate; 1–4 mm long; shorter than fertile; separately deciduous. Companion sterile spikelet glumes winged on keels.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets oblong; dorsally compressed; 4–5 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 oblong; 1 length of spikelet; coriaceous; 2-keeled; winged on keel; winged narrowly; winged above. Lower glume surface smooth. Lower glume apex truncate, or obtuse. Upper glume ovate; chartaceous; 1-keeled.

FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret ovate; 3.5–4.5 mm long; hyaline; 0 -veined. Fertile lemma ovate; hyaline; without keel; 0–1 -veined. Palea 1 length of lemma.

FLOWER Anthers 3; 2 mm long.

DISTRIBUTION Asia-temperate: China. Asia-tropical: India and Indo-China.

NOTES Andropogoneae. Bor.

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