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.

Digitaria subcorymbosa

HABIT Perennial. Rhizomes elongated. Culms erect; 75–125 cm long. Culm-internodes terete; distally glabrous. Leaf-sheath oral hairs ciliate. Ligule an eciliate membrane; obtuse. Leaf-blades 2–40 cm long; 7–9 mm wide; stiff; glaucous. Leaf-blade surface pilose; sparsely hairy, or moderately hairy. Leaf-blade margins cartilaginous; scabrous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 10–20; borne along a central axis; unilateral; 5–20 cm long. Central inflorescence axis 10–15 cm long. Rhachis angular; scabrous on margins; glabrous on margins. Spikelet packing lax. Raceme-bases linear; 10–50 mm long.

Spikelets in pairs. Fertile spikelets sessile and pedicelled; 2 in the cluster. Pedicels 3–4 mm long; scaberulous; villous; hairy at base; with 5–6 mm long hairs.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets lanceolate; dorsally compressed; 3–3.5 mm long; falling entire.

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.1 mm long; 0.05 length of spikelet; membranous. Lower glume apex acute. Upper glume oblong; 0.3 mm long; 0.15 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pubescent. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret lanceolate; 1 length of spikelet; membranous; 7 -veined; pubescent; ciliate on margins; bearing hairs 0.25–0.35 mm long; acute. Fertile lemma lanceolate; 3–3.5 mm long; cartilaginous; much thinner on margins; without keel. Lemma surface punctate. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.

FLOWER Anthers 3.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Paniceae. Fl Indo-Chine 1997.

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