Odontoglossum crispum Lindl., Ann. Mag. Nat. Hist. 15: 256. 1845.
Type: Colombia. Cundinamarca: Bogota, in the woods between the villages of Zipaquira and Pacho, T. Hartweg s.n. (holotype: K-L!, isotype: W).
Illustrated specimen: Colombia. Putumayo, Municipality of Santiago, Vereda Balsayaco, 2216 m. December 2016. J.S. Moreno & A.L. Erazo 312 (CAUP; LCDP voucher).
Odontoglossum crispum is an endemic and endangered species from Colombia. It is recognized by its large and showy white resupinate owers sometimes with a purple hue, with or without brown or purple dots, similar broad, ovate sepals and petals with an undulate, sometimes lacerate or crispate margin, and a lip with a yellow callus consisting of two prominent lateral denticulate crests and a pair of projecting median teeth adnate to the base of the column. This species is most similar to Odontoglossum nobile Rchb.f., also endemic to Colombia in the departments of Boyacá, Santander and Norte de Santander. It has similar white flowers, sometimes with brown to purple dots on the sepals, petals and lip but can be distinguished from O. crispum by having smaller flowers with ovately broadened and curved basal anks of the column, vs. parallel, low, membranous flanks and parallel adnation sutures for O. crispum. . .