Type. Am Marary Juruá, Estado Amazonas, Brazil, Sep 1900, E. Ule 5136.
The original description gives a false impression concerning the glabrity of the vegetative parts. An examination of the type collection from HBG and MG shows the stems and petioles microscopically finely puberulent, the leaf blades minutely puberulent with a fine close tomentum below on the midrib and lateral nerves, the margins of the leaves with a sparse microscopic ciliolation, the peduncle minutely dense puberulent, and the axes of the inflorescence densely puberulent. Standley also described the species as “a nearly glabrous shrub.” In addition to the pubescence of the stems, leaves, peduncle, and inflorescence axes, the calyx and hypanthium are minutely puberulent and the exterior of the corolla has a minute and densely papillate puberulence over the surface.