| Taxon | Collector | Location | Type Status | Barcode | |
|---|---|---|---|---|---|
| Siphanthera cowanii Wurdack | B. Maguire 31028 with R. S. Cowan, J. J. Wurdack, 17 Jan 1951 | Venezuela. Amazonas. Cerro Moriche, Río Ventuari, NW base of Cerro Moriche. |  | ||
| Siphanthera cowanii Wurdack | B. Maguire 30993 with R. S. Cowan & John J. Wurdack, 17 Jan 1951 | Venezuela. Amazonas. Cerro Moriche, Río Ventuari. At northwest base of mountain. | holotype | 1239790 | |
| Siphanthera cowanii Wurdack | 03375000 |  | |||
| Siphanthera cowanii Wurdack | 03375001 |  | |||
| Siphanthera cowanii Wurdack | 03375002 |  | |||
| Siphanthera cowanii Wurdack | B. Maguire 30531 | Venezuela. Amazonas. Cerro Yapacana, Río Orinoco, Savanna No. 3, at northwest base of mountain. | 03374999 |  | |
| Siphanthera cowanii Wurdack | B. Maguire 36588 | Venezuela. Amazonas. Cerro Yapacana, Río Orinoco, edge of Savanna No. 3, at northwest base of mountain. | 03374998 |  |
