Vascular Plants of North Carolina
Account for Broadleaf Signal-grass - Urochloa platyphylla   (Munro ex Wright) R.D. Webster
Members of Urochloa with account distribution info or public map:
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Section 5 » Order Cyperales » Family Poaceae
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Author(Munro ex Wright) R.D. Webster
DistributionCoastal Plain, Sandhills, and Piedmont. To be expected elsewhere. First collected in NC in Richmond County in 1959.

Native of the West Indies and South America. In N.A. from MD to FL and TX.
AbundanceFairly common to frequent.
HabitatWeed in crop fields (corn, cotton, soybeans), barnyards, roadsides, sandy fields, weedy ditches. Also a weed (or planted?) in wildlife food plots.
PhenologyFlowering and fruiting July-October.
IdentificationBroadleaf Signal-grass is annual, with spreading stems that root at nodes. The flowering stems (culms) turn rather erect and produce a terminal inflorescence (and also in upper leaf axils). Inflorescence branches are arranged in 2 ranks, are slender, and look superficially like those of Paspalum, except that the spikelets grow singly along each side of the rachis, never in pairs. Broadleaf Signal-grass shows obvious cross-veins on upper portions of 2nd glumes, a feature absent in the very similar Browntop Millet.
Taxonomic CommentsSpecies in the genus Urochloa have in the past been placed in Brachiaria and Panicum.
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