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GrassBase - The Online World Grass Flora
Descriptions
W.D. Clayton, M. Vorontsova, K.T. Harman & H. Williamson
© Copyright The Board of Trustees, Royal Botanic Gardens, Kew.
Digitaria enodis
HABIT Perennial. Rhizomes short. Basal innovations intravaginal. Culms 15–30 cm long; 1 -noded. Culm-nodes brown. Lateral branches lacking. Leaf-sheaths 6–18 cm long; glabrous on surface, or pilose. Ligule an eciliate membrane; 1–1.5 mm long; brown; lacerate; truncate. Leaf-blades filiform; involute; 6–12 cm long; 1 mm wide. Leaf-blade surface scabrous; rough abaxially; glabrous, or pubescent; hairy abaxially.
INFLORESCENCE Inflorescence composed of racemes. Peduncle glabrous, or pilose above.
Racemes 2–3; paired, or digitate; unilateral; 4–8 cm long. Rhachis angular; scabrous on margins.
Spikelets in pairs, or in threes. Fertile spikelets pedicelled. Pedicels unequal; scabrous.
FERTILE SPIKELETS Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets elliptic; dorsally compressed; 2.5–3 mm long; falling entire.
GLUMES Glumes two; shorter than spikelet; thinner than fertile lemma. Lower glume oblate; 0.2–0.3 mm long; 0.1 length of spikelet; hyaline; 0 -veined. Lower glume lateral veins absent. Lower glume apex obtuse. Upper glume lanceolate; 2–2.1 mm long; 0.75 length of spikelet; membranous; without keels; 3 -veined. Upper glume surface pubescent; hairy between veins. Upper glume hairs dark brown. Upper glume apex acute.
FLORETS Basal sterile florets barren; with palea. Lemma of lower sterile floret lanceolate; 0.9–1 length of spikelet; membranous; 5 -veined; pilose; hairy between veins but central interspaces glabrous; bearing dark brown hairs; acute. Palea of lower sterile floret 0.5–0.8 mm long. Fertile lemma elliptic; 2.5–3 mm long; cartilaginous; much thinner on margins; dark brown; without keel. Lemma surface striate. Lemma margins flat; covering most of palea. Lemma apex acute. Palea cartilaginous.
FLOWER Anthers 3; 1.8 mm long.
FRUIT Caryopsis with adherent pericarp; 2 mm long. Hilum punctiform.
DISTRIBUTION South America: southern South America.
NOTES Paniceae. Agrasar 1995.
Please cite this publication as detailed in How to Cite Version: 3rd February 2016.
