| Collector | Madsen, J. E. |
| Number | 75920A |
| Collected with | |
| Country | Ecuador |
| Subpart | LOJA |
| County | |
| Locality | Road Malacatos - Gonzanama, 4 km W of Río Catamayo. |
| Coordinates | 4° 11' S 79° 20' W |
| Minimum elevation (m) | 1500 |
| Maximum elevation (m) | 1500 |
| Start date | 1988/12/14 |
| End date | 1988/12/14 |
| Family | Cactaceae |
| Identification | Monvillea diffusa Britton & Rose |
| Determined by | J. E. Madsen, 1989 |
| Identification qualifier | |
| Field notes | The fruit (8 X 6 cm) is the largest observed in Ecuador. FAA available at AAU. (no specimen). |