Digitaria
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Authority
Acevedo-Rodríguez, Pedro & collaborators. 1996. Flora of St. John, U.S. Virgin Islands. Mem. New York Bot. Gard. 78: 1-581.
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Family
Poaceae
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Scientific Name
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Description
Genus Description - Annual or perennial, cespitose herbs; culms erect or decumbent, unbranched or sparingly branched; internodes usually hollow. sheaths conspicuously inflated or not, smooth or scabrous; ligule a membrane or a ciliate membrane; blades filiform to lanceolate, flattened to cylindrical, the margins smooth or scabrous. Main axis of inflorescence more or less digitate, with appressed or divaricate primary branches; secondary branches appressed or spreading; rachis terminating in a spikelet; disarticulation at the spikelet base; callus not differentiated. Spikelets abaxial, plano-convex; lower glume present or absent, not encircling the spikelet base; upper glume 0.3-1 times spikelet length; lemma of lower floret membranous; lemma of upper floret 0.5-1.2 times the length of the lower floret, cartilaginous, smooth, striate, or muricate, dull, with flat, thin margins, muticous or mucronate.