Type: Brazil: Amazonas: Pico Rondon, 0-3 km N of km 211 of Perimetral N Highway, lithophyte in scrub forest on upper S ridge, common only on summit, ca. 1° 32' N; 62° 48' W; 3 Feb 1984, J. Pipoly, G. Samuels & J. G. Oliveira 6623 (NY holotype, MG isotype).