Very near to R. longisetis and possibly only racially distinct from it. Inflorescence smaller, 1-2 cm across. Spikelets shorter, lanceolate, 6-10 mm long. Bristles glabrous or ciliate at the base, not plumose, 5 of them about reaching the top of the style-base, 6-7 mm long, 1 much shorter and very thin, almost smooth. Anthers usually somewhat shorter, 1½-2½ mm long, the base destitute of pollen. Style-base narrower, about ½ as wide as the apex of the nut. Nut his-pidulous at the top, (2½-)3-4 by 1-1¼ mm.
On damp sandy soil in savannahs and savannah forests, in open grasslands, from low altitudes up to 300 m.
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