Monographs Details: Borreria aristeguietaena 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 - Herbacea annua, caulibus tenuibus 20 cm altis 0.8-1 mm diam subquadrangu-laribus angulis praecipue retrorse pilosis inter angulos glabris vel parce pilosis; stipularum vaginis 2.5 mm longis 2.5-3 mm latis hirtello-puberulis setis 6-7 tenuibus 1.2-3.5 mm longis glabris; foliis sessilibus lineari-lanceolatis apice acutis basi angus-tatis 1.5-2.5 × 0.25-0.3 cm supra glabris subtus costa nervis lateralibusque parce scabrido-hispidulis ceterum praecipue glabris, nervis lateralibus utroque latere 3; inflorescentiis axillaribus terminalibusque subhemisphaericis parvis 3-6 mm altis 7-10 mm latis; foliis involucralibus 2 foliosis caulinis simillimis; calycis lobis 4 linearibus subobtusis 1.3-1.5 × 0.1 mm basin versus pilosulis marginibus hispidulo-serrulatis; hypanthio 1 mm longo superne pilis adscendentibus pilosulis; corollis infundibuliformibus 2 mm longis, tubo 1.5 mm longo, lobis ovato-oblongis 0.5 mm longis intus non dense papillatis; staminibus paullo exsertis, antheris 0.4 mm longis, filamentis 0.6 mm longis; stylo 2 mm longo, stigmate subcapitate subbilobato; capsulis 1.2-1.5 mm longis superne dense pilosis.

Discussion:From B. ocimoides this taxon differs in the longer and infundibuliform corolla, which is longer than the calyx, and with the corolla lobes not densely papillose within as in B. ocimoides.