Monographs Details: Chalepophyllum guianense Hook.f. var. guianense
Authority: Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
Family:Rubiaceae
Description:Latin Diagnosis - Folia variabilia, laminis ovali-oblongis vel suborbicularibus vel oblongoobovatis 2-9 cm longis 1.5-5.5 cm latis, in petiolum ad 10 mm longum angustata; floribus solitariis breviter pedicellatis vel inflorescentiis axillaribus ad 5 cm longe pedunculatis cum floribus 1-4; calycis tubo turbinato adpresso-canesceiiti, lobis subaequalibus vel valde inaequalibus ovatis vel lanceolatis vel oblongo-spatulatis obtusis vel acutis 2-17 mm longis 1-3.5 mm latis; corollis variabilibus, tubo 10-16 mm longo, lobis ovatis vel ovato-ovalibus obtusis vel acuminatis 8-12 mm longis; stylis 5.5-13 mm longis; staminibus prope medium vel supra medium corollae insertis; capsulis 8-17 mm longis.

Discussion:

A variation with the leaf-blades all markedly narrowed to a cuneate base and of a narrowly obovate or spatulate-obovate shape, and 2 1/2-3 1/2 times as long as broad, is exemplified by Maguire 33700 from savannas near Kavanayen, Venezuela. It is a distinct variety: