Caulerpa laxa Greville, 1853a: 3, pl. II: upper figs. 1, 2 (type locality: eastern India).—Greville, 1853b: 198–199, pl. IV: upper figs. 1, 2.— Harvey, 1857a: no. 64.— G. Murray, 1887: 38.
Caulerpa cylindracea Sonder var. laxa (Greville) J. Agardh, 1873: 34.
Caulerpa racemosa (Forsskål) J. Agardh [var. laetevirens] forma laxa (Greville) Weber-van Bosse, 1898: 367, pl. XXXIII: fig. 22.—Børgesen, 1932a: 60, figs. 2, 3 (part).— Børgesen, 1934b: 20.— Umamaheswara Rao, 1969d: 39.— Umamaheswara Rao, 1970b: 367.— K. Srinivasan, 1973: 42.
Caulerpa laetevirens Montagne forma laxa (Greville) Svedelius, 1906a: 124–127, fig. 19 (including Indian Ocean record).—Svedelius, 1906b: 194.
INDIAN OCEAN DISTRIBUTION: India, Sri Lanka.