Type: Ecuador: Esmeraldas, km 4 on Lita-Alto Tambo road, on rocks along the Rio Negro, elev. ca 700 m, Jan. 1990, R. Determann & Atlanta Botanical Gardens s.n. legit; flowered in cultivation at the Marie Selby Botanical Gardens SEL 91-89,20 Feb. 1992, H.E. Luther s.n. (holotype: SEL; isotypes: QCA, QCNE).