It was identified 24 species of Cyperus in
the state of Rio Grande do Norte, including a
new species (Cyperus sp. 1), here described, but
that will be properly published elsewhere. This
new species was found in vegetation of Caatinga
and is morphologically similar to C. alvesii G.C.
Tucker and C. ligularis L, but can be recognized
by the spikelets, glumes and rachilla internodes.