| Stenospermation maguirei A.M.E.Jonker & Jonker | K. M. Redden 4056 | Guyana. Amatuk Falls on left bank of Potaro near village. | | 3803715 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | P. A. Mutchnick 204 | Guyana. Potaro-Siparuni. Pakaraima Mtns: Ireng River at Kurutuik Falls. | | 3803712 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | B. Hoffman 2397 | Guyana. Cuyuni-Mazaruni. Pakaraima Mtns, Kurupung R; Imatta Creek near Kurupung Landing. | | 3803713 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | W. J. Hahn 3984 | Guyana. Potaro-Siparuni. Kaieteur Falls Nat'l Park. | | 3803711 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | H. D. Clarke 9201 | Guyana. Potaro-Siparuni. Mt. Ayanganna, east face, camp at base of second of four escarpment. | | 03803710 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | J. A. Steyermark 87457 | Venezuela. Delta Amacuro. Río, Amacuro, Venezuela-British Guiana frontier. Sierra Imataca. Downstream from mouth of Yarakita River. | | 3803714 |  |
| Stenospermation maguirei A.M.E.Jonker & Jonker | J. A. Steyermark 87457 | Venezuela. Delta Amacuro. Río, Amacuro, Venezuela-British Guiana frontier. Sierra Imataca. Downstream from mouth of Yarakita River. | | 3803716 |  |
