| Name | Hexagonia carbonaria Berkeley & M. A. Curtis |
| Authorship | Berkeley & M. A. Curtis |
| Rank | Species |
| Placed in | Hexagonia Fries |
| Citation | 1872 Grevillea 1(no. 5): 68 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Hexagonia carbonaria Berkeley & M. A. Curtis |
| Identification made in | [no date] (1) |