Monographs Details: Psittacanthus crassifolius (Mart.) Mart.
Authority: Maguire, Bassett. 1978. The botany of the Guayana Highland--part X. Mem. New York Bot. Gard. 29: 1-288.
Discussion:Yearly ramules, margin of leaves, and inflorescences rufo-furfuraceous, either faces of leaf covered with minute stomata, not readily seen. Included for comparison with the following one.