| Name | Gastroclonium capense (Harvey) De Toni |
| Authorship | (Harvey) De Toni |
| Rank | Species |
| Placed in | Gastroclonium Kützing |
| Citation | 1900 Syll. Alg. 4(2): 567 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Gastroclonium capense (Harvey) De Toni |
| Identification made in | [no date] (4) |