| Gracilaria ramisecunda E.Y. Dawson, 1949 |
| Gracilaria robusta Setch., 1899 |
| Gracilaria rubrimembra E.Y. Dawson, 1949 |
| Gracilaria secundata Harvey, 1863 |
| Gracilaria sjoestedtii Kylin, 1930 |
| Gracilaria spinigera E.Y. Dawson, 1949 |
| Gracilaria spinulosa (Okamura) C.F. Chang & B.M. Xia, 1976 |
| Gracilaria subsecundata Setch. & N.L. Gardner, 1924 |
| Gracilaria symmetrica E.Y. Dawson, 1949 |
| Gracilaria tenuifolia W.R. Taylor, 1945 |
| Gracilaria tenuifrons C.J. Bird & E.C. de Oliveira, 1986 |
| Gracilaria tepocensis (E.Y. Dawson) E.Y. Dawson, 1961 |
| Gracilaria textorii (Suringar) De Toni, 1895 |
| Gracilaria textorii var. cunninghamii (Farlow) E.Y. Dawson, 1961 |
| Gracilaria textorii var. textorii (Suringar) De Toni, 1895 |
| Gracilaria tikvahiae McLachlan, 1979 |
| Gracilaria turgida E.Y. Dawson, 1949 |
| Gracilaria usneoides (C. Agardh) J. Agardh, 1852 |
| Gracilaria veleroae E.Y. Dawson, 1944 |
| Gracilaria venezuelensis W.R. Taylor, 1942 |