| Tetraneuris scaposa (DC.) Greene, 1898 |
| Tetraneuris scaposa var. argyrocaulon (K.F. Parker) K.F. Parker, 1980 |
| Tetraneuris scaposa var. scaposa (DC.) Greene, 1898 |
| Tetraneuris turneri (K.F. Parker) K.F. Parker, 1980 |
| Thelechitonia Cuatrec., 1954 |
| Thelesperma Less., 1831 |
| Thelesperma ambiguum A. Gray, 1883 |
| Thelesperma burridgeanum (Regel) S.F. Blake, 1928 |
| Thelesperma filifolium A. Gray, 1849 |
| Thelesperma filifolium var. filifolium A. Gray, 1849 |
| Thelesperma filifolium var. intermedium (Rydb.) Shinners, 1966 |
| Thelesperma graminiformis (Sherff) Melchert, 1990 |
| Thelesperma longipes A. Gray, 1852 |
| Thelesperma megapotamicum (Spreng.) Kuntze, 1898 |
| Thelesperma megapotamicum var. ambiguum (A. Gray) Shinners, 1950 |
| Thelesperma megapotamicum var. megapotamicum (Spreng.) Kuntze, 1898 |
| Thelesperma megapotamicum var. ramosius (S.F. Blake) Melchert, 1990 |
| Thelesperma muelleri (Sherff) Melchert, 1990 |
| Thelesperma ramosius S.F. Blake, 1941 |
| Thelesperma scabridulum S.F. Blake, 1935 |