| Bolivia | | | Jørgensen, P. M., M. H. Nee & S. G. Beck | 2014 | Catálogo de las plantas vasculares de Bolivia | Cat. Pl. Vasc. Bolivia, Monogr. Syst. Bot. Missouri Bot. Gard. | 127(1–2): i–viii, 1–1744 |
| Bolivia | | | Jørgensen, P. M., M. H. Nee, S. G. Beck & A.F. Fuentes | 2015 en adelante | Catalogo de las plantas vasculares de Bolivia (actualizaciones en línea) | | |
| Ecuador | | | Robinson, H. E. & J. Cuatrecasas | 1977 | Notes on the genus and species limits of Pseudogynoxys (Greenm.) Cabrera (Senecioneae, Asteraceae) | Phytologia | 36(3): 177–192 |
| Ecuador | | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| 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 | Bolívar | | 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 | Chimborazo | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Chimborazo | | 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 | Cotopaxi | | Jørgensen, P. M. & C. Ulloa Ulloa | 1994 | Seed plants of the high Andes of Ecuador—A checklist | AAU Rep. | 34: 1–443 |
| Ecuador | Cotopaxi | | 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 | El Oro | | 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 | Esmeraldas | | 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 | Guayas | | 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 | Manabí | | 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. & S. León-Yánez | 1999 | Catalogue of the Vascular Plants of Ecuador | Monogr. Syst. Bot. Missouri Bot. Gard. | 75: i–viii, 1–1181 |
| Peru | | | Robinson, H. E. & J. Cuatrecasas | 1977 | Notes on the genus and species limits of Pseudogynoxys (Greenm.) Cabrera (Senecioneae, Asteraceae) | Phytologia | 36(3): 177–192 |