| Colombia | | | Dodson, C.H. | 1992 | Checklist of the Orchids of the Western Hemisphere | | draft: |
| Colombia | | | Luteyn, J. L. | 1999 | Páramos, a checklist of plant diversity, geographical distribution, and botanical literature | Mem. New York Bot. Gard. | 84: viii–xv, 1–278 |
| Ecuador | | | Dodson, C.H. | 1992 | Checklist of the Orchids of the Western Hemisphere | | draft: |
| Ecuador | Azuay | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Azuay | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Cañar | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Cañar | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Carchi | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Imbabura | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Loja | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Loja | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Morona-Santiago | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Morona-Santiago | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Napo | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Napo | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Pichincha | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Pichincha | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Sucumbíos | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Tungurahua | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Ecuador | Tungurahua | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Zamora-Chinchipe | | Jørgensen, P. M. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Peru | | | Brako, L. & J. L. Zarucchi | 1993 | Catalogue of the flowering plants and gymnosperms of Peru | Monogr. Syst. Bot. Missouri Bot. Gard. | 45: i–xl, 1–1286 |
| Peru | | | Dodson, C.H. | 1992 | Checklist of the Orchids of the Western Hemisphere | | draft: |
| Peru | | | Bockemühl, L. | 1986 | Die Gattung Odontoglossum H.B.K. Studien zu einer natürlichen Gliederung (18. Forsetzung) | Orchidee (Hamburg) | 37(4): 159–162 |
| Venezuela | | | Dodson, C.H. | 1992 | Checklist of the Orchids of the Western Hemisphere | | draft: |