| Cotyledon batesii Hemsl., 1878 |
| Cotyledon bifida (Schltdl.) Hems., 1880 |
| Cotyledon coccinea Cav., 1793 |
| Cotyledon desmetiana (De Smet) Hemsl., 1880 |
| Cotyledon gibbiflora (Moc. & Sessé ex DC.) Baker, 1869 |
| Cotyledon glauca Baker, 1869 |
| Cotyledon jurgensenii Hemsl., 1878 |
| Cotyledon mucronata (Schltdl.) Baker, 1869 |
| Cotyledon parviflora Hemsl., 1878 |
| Cotyledon pinnata Lam., 1786 |
| Cotyledon pumila (Schltdl.) Baker, 1869 |
| Cotyledon schaffneri S. Watson, 1882 |
| Cotyledon secunda (Booth ex Lindl.) Baker, 1869 |
| Cotyledon strictiflora (A. Gray) Baker, 1869 |
| Cotyledon subrigida B.L. Rob. & Seaton, 1893 |
| Crassula L., 1753 |
| Crassula aquatica (L.) Schönland, 1890 |
| Crassula closiana (Gay) Reiche, 1897 |
| Crassula connata (Ruiz & Pav.) Berger, 1930 |
| Crassula connata var. eremica (Jeps.) M. Bywater & Wickens, 1984 |