| Name | Polanisia dodecandra subsp. riograndensis Iltis |
| Authorship | Iltis |
| Rank | Subspecies |
| Placed in | Polanisia dodecandra (Linnaeus) de Candolle |
| Citation | 1969 Southw. Naturalist 14(1): 116 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Polanisia dodecandra subsp. riograndensis Iltis |
| Identification made in | [no date] (3), 1968 (1) |