| Name | Rhynchospora capitellata f. controversa (S. F. Blake) Gale |
| Authorship | (S. F. Blake) Gale |
| Rank | Forma |
| Placed in | Rhynchospora capitellata (Michaux) Vahl |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Rhynchospora capitellata f. controversa (S. F. Blake) Gale |
| Identification made in | 1941 (1), 1991 (1) |