| Cnemidaria horrida (L.) C. Presl, 1836 |
| Cnemidaria mutica (Christ) R.M. Tryon, 1970 |
| Cnemidaria mutica var. chiricana (Maxon) Stolze, 1974 |
| Cnemidaria mutica var. contigua (Underw. ex Maxon) Stolze, 1974 |
| Cnemidaria mutica var. grandis (Maxon) Stolze, 1974 |
| Cnemidaria mutica var. mutica (Christ) R.M. Tryon, 1970 |
| Cnemidaria suprastrigosa R.C. Moran, 1990 |
| Cyathea Sm., 1793 |
| Cyathea arborea (L.) Sm., 1793 |
| Cyathea aristata Domin, 1930 |
| Cyathea articulata Fée, 1857 |
| Cyathea bicrenata Liebm., 1849 |
| Cyathea bourgaei E. Fourn., 1872 |
| Cyathea chiricana (Maxon) Domin, 1929 |
| Cyathea chiricana var. contigua (Maxon) Lehnert, 2012 |
| Cyathea costaricensis (Mett. ex Kuhn) Domin, 1930 |
| Cyathea decurrentiloba Domin, 1930 |
| Cyathea delicatula Maxon, 1909 |
| Cyathea divergens Kunze, 1834 |
| Cyathea divergens var. tuerckheimii (Maxon) R.M. Tryon, 1976 |