Dignathia hirtella

HABIT Annual; caespitose. Culms erect; 10–25 cm long; wiry. Ligule a ciliate membrane. Leaf-blades 1–6 cm long; 1–3 mm wide.

INFLORESCENCE Inflorescence composed of racemes.

Racemes numerous; borne along a central axis; in a multilateral false spike; oblong; sinuous; unilateral; 0.5–0.9 cm long; bearing few fertile spikelets; bearing (1–)2 fertile spikelets on each. Central inflorescence axis 2–5 cm long. Rhachis deciduous from axis; flattened; terminating in a sterile spikelet. Raceme-bases cuneate; 2 mm long; pilose; hairy on margins.

Spikelets solitary, or in pairs. Fertile spikelets sessile; 1–2 in the cluster; subequal.

STERILE SPIKELETS Apical sterile spikelets rudimentary; 1 in number.

FERTILE SPIKELETS Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets orbicular; laterally compressed; gibbous; rostrate; 5–7 mm long; falling entire; deciduous with accessory branch structures.

GLUMES Glumes dissimilar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; gibbous; 5–6 mm long; 0.8–1 length of upper glume; coriaceous; 1-keeled; 1 -veined. Lower glume lateral veins absent. Lower glume surface pubescent. Lower glume margins ciliate. Lower glume apex acute. Upper glume orbicular; gibbous; 5–7 mm long; 1.2–1.5 length of adjacent fertile lemma; indurate; with hyaline margins; 1-keeled. Upper glume surface pubescent. Upper glume margins ciliate. Upper glume apex caudate.

FLORETS Fertile lemma ovate; 4–5 mm long; membranous; keeled; 3 -veined. Lemma surface pubescent. Lemma apex acute; mucronate. Palea 2 -veined.

FLOWER Anthers 3.

FRUIT Caryopsis with adherent pericarp; ellipsoid; dorsally compressed; plano-convex.

DISTRIBUTION Africa: northeast tropical and east tropical. Asia-temperate: Arabia. Asia-tropical: India.

NOTES Cynodonteae. FTEA.

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