Digitaria quinhonensis

HABIT Perennial. Culms erect; 60–80 cm long. Culm-internodes distally glabrous. Leaf-sheaths mostly shorter than adjacent culm internode. Ligule an eciliate membrane; 2–3 mm long; brown. Leaf-blades linear, or lanceolate; 8–14 cm long; 6–8 mm wide. Leaf-blade midrib conspicuous. Leaf-blade venation with 10 secondary veins. Leaf-blade surface glabrous; hairless except near base. Leaf-blade margins cartilaginous; undulate; scaberulous. Leaf-blade apex attenuate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 4–9; digitate; unilateral; 10–12 cm long. Central inflorescence axis 3–4 cm long; glabrous. Rhachis angular; 0.3 mm wide. Spikelet packing lax.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal; 0.5 mm long, or 3 mm long; scaberulous.

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

GLUMES Glumes shorter than spikelet; thinner than fertile lemma. Lower glume ovate; 0.3 mm long; 0.1 length of spikelet; membranous. Lower glume apex acute. Upper glume lanceolate; 1.3–1.5 mm long; 0.33 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pilose. 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; with equidistant veins; pubescent; acuminate. Fertile lemma lanceolate; 3–3.5 mm long; cartilaginous; much thinner on margins; light brown; 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. Camus 1997.

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