Type : Guyana, bassin de l'Essequibo, env. 05°05'N, Twasinki falls, lisière de la forêt, 28/09/1937, fleurs. Shrub to 3 m. Corolla tube pale red, the lobes yellow. A.C. Smith 2141 (HT:
V0069623F; IT:
A00096717,
K000424514,
NY00131969,
P03941313,
US00138608).