Monographs Details: Sabicea velutina subsp. duidensis Steyerm.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Family:Rubiaceae
Description:Species Description - A subsp velutina petiolis 7-13 mm longis recedit; laminis basi subobtusis duo et pars quarta longioribus quam latioribus; capitulis 16-20-floris; corollis 12-12.5 mm longis, tubo 9 mm longo; antheris 1.2-1.3 mm longis.

Distribution and Ecology - VENEZUELA. Amazonas: recently fired slopes of Culebra Peak, Cerro Duida, alt 1600 m, 22-24 April 1949, Maguire & Maguire, Jr. 29137 (holotype NY); region del Duida y Marahuaea, Apr-Jun 1950, Barnes 21.