Monographs Details: Duroia maguirei var. patentinervia Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Latin Diagnosis - A var macrocarpa foliis subtus glabris recedit; ramis prope apices castaneo-hirtellis; stipulis dense castaneo-hirtellis 2.5 cm longis; foliis plerumque 3-verticillatis interdum oppositis petiolatis, petiolis 5-7 cm longis basi fusco-hirtellis superne glabris, laminis coriaceis late ovatis apice obtuse abrupte acutis vel subacuminatis basi cordatis vel rotundatis vel subtruncatis 20-28 × 15-23 cm supra secus costam mediam nervos lateralesque minute tomentellis ceterum glabris subtus omnino glabris, utrinque venulis tertiariis transverse rugulosis prominentibus supra subsulcatis subtus elevatis, nervis lateralibus utroque latere 13-17 supra impressis vel sulcatis subtus elevatis saltern infra medium late patentibus infimis fere horizontalibus ante marginem 1-2 mm anastomosantibus 1.5-2 cm remotis; fructu sessili subgloboso 5-6 × 5-5.5 cm dense fulvo-hirsutulo, pilis brevibus patentibus instructo.

Discussion:

Type. Tall rain forest 7-9 km from Yavita on road to Pimichin, Amazonas, Venezuela, 22 Apr 1970, tree 10 m; leaves coriaceous, dark green above, dull green below, Julian A. Steyermark & George Bunting 102939 (holotype VEN, isotype NY).

Paratype. Base de la Piedra del Cucuy, cerca de la frontera con el Brasil, Dept. Rio Negro, Amazonas, alt 200 m, 2 Feb 1968, Ruiz Teran 5218.

From D. maguirei var maguirei this taxon differs in the glabrous lower surface, together with the glabrous lower midrib and lateral nerves. The base of the leaf blades varies from cordate to rounded.