| Diodia apiculata (Willd. ex Roem. & Schult.) K. Schum., 1889 |
| Diodia aspera Brandegee, 1914 |
| Diodia brasiliensis Spreng., 1824 |
| Diodia brasiliensis var. angulata (Benth.) Standl., 1935 |
| Diodia crassifolia Benth., 1845 |
| Diodia maritima Thonn., 1827 |
| Diodia ocymifolia (Willd. ex Roem. & Schult.) Bremek., 1934 |
| Diodia polymorpha Cham. & Schltdl., 1828 |
| Diodia polymorpha var. angulata (Benth.) K. Schum., 1888 |
| Diodia prostrata Sw., 1788 |
| Diodia pulchella Brand, 1924 |
| Diodia rigida Cham. & Schltdl., 1828 |
| Diodia saponariifolia (Cham. & Schltdl.) K. Schum., 1889 |
| Diodia sarmentosa Sw., 1788 |
| Diodia serrulata (P. Beauv.) G. Taylor, 1944 |
| Diodia subulata (DC.) Standl., 1931 |
| Diodia teres Walter, 1788 |
| Diodia teres var. angustata A. Gray, 1886 |
| Diodia teres var. teres Walter, 1788 |
| Diodia tetracocca (M. Martens & Galeotti) Hemsl., 1879 |