Digitaria larsenii

HABIT Annual. Culms 20–30 cm long. Culm-nodes glabrous. Leaf-sheaths pilose; with tubercle-based hairs. Ligule an eciliate membrane; 1.5 mm long; truncate. Leaf-blades 5–10 cm long; 2.5 mm wide. Leaf-blade surface scaberulous; rough abaxially. Leaf-blade apex acuminate.

INFLORESCENCE Inflorescence composed of racemes.

Racemes 1–4; borne along a central axis; unilateral; 2–4 cm long. Central inflorescence axis 2 cm long. Rhachis wingless; angular.

Spikelets in pairs. Fertile spikelets pedicelled; 2 in the cluster. Pedicels unequal; scaberulous; tip discoid.

FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; acute; 1.75 mm long; falling entire.

GLUMES Glumes one the lower absent or obscure; shorter than spikelet; thinner than fertile lemma. Upper glume elliptic; 1.5 mm long; 0.85 length of spikelet; membranous; without keels; 5 -veined. Upper glume surface pubescent; with clavate hairs. Upper glume apex acute.

FLORETS Basal sterile florets barren; without significant palea. Lemma of lower sterile floret elliptic; 1 length of spikelet; membranous; 7 -veined; pubescent; with clavate hairs; acute. Fertile lemma elliptic; 1.75 mm long; cartilaginous; much thinner on margins; dark brown; shiny; without keel. Lemma margins flat; covering most of palea. Lemma apex apiculate. Palea cartilaginous.

FLOWER Anthers 3; 0.75 mm long.

DISTRIBUTION Asia-tropical: Indo-China.

NOTES Paniceae. Bor 1993.

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