Monographs Details: Diodia radula (Roem. & Schult.) Cham. & Schltdl.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Discussion:

Spermacoce radula Willd. & Hoffmanns, ex R. & S., Syst. Veg. 3: 531. 1818.

The Venezuelan specimens of this taxon represent a distinct subspecies