| Name | Gastroclonium ovale var. coulteri (Harvey) Harvey ex Mazza |
| Authorship | (Harvey) Harvey ex Mazza |
| Rank | Variety |
| Placed in | Gastroclonium ovale (Hudson) Kützing |
| Citation | 1908 Nuova Notarisia 19: 6 |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Gastroclonium ovale var. coulteri (Harvey) Harvey ex Mazza |
| Identification made in | [no date] (7) |