This species is charcaterized by its glabrescent habit, its short to medium-sized triangular stipules, its petiolate rather well developed elliptic leaves apparently without domatia, its pedunculate paniculiform inflorescences with reduced bracts and developed secondary axes, its flowers borne in subcapitate to congested-umbelliform small groups, its short subtruncate calyx limbs, and its somewhat small slender corollas with the tube significantly longer than the lobes. Its fruits are apparently not yet documented.

Coussarea evoluta is similar to Coussarea liesneri, and these may be not be distint. Steyermark originally distinguished them by the slightly larger stipules and shorter calyx limb (2.0 mm long) of Coussarea evoluta, vs. the calyx limb 2.5 mm long in Coussarea liesneri. Coussarea evoluta is also similar to Coussarea surinamensis of the Guianas and northeastern Brazil; these species should perhaps be compared in more detail.