| Hystrix patula Moench, 1794 |
| Ichnanthus P. Beauv., 1812 |
| Ichnanthus (P. Beauv.) Trin., 1834 |
| Ichnanthus almadensis (Nees ex Trin.) Kunth, 1833 |
| Ichnanthus almadensis var. almadensis (Nees ex Trin.) Kunth, 1833 |
| Ichnanthus almadensis var. lanceolatus Döll, 1877 |
| Ichnanthus almadensis var. ovato-lanceolatus Döll, 1877 |
| Ichnanthus almadensis var. subovatus Döll, 1877 |
| Ichnanthus alsinoides (Griseb.) Munro ex Hemsl., 1885 |
| Ichnanthus angustifolius Swallen, 1931 |
| Ichnanthus apiculatus Scribn., 1901 |
| Ichnanthus areolatus K.E. Rogers, 1972 |
| Ichnanthus attenuatus K.E. Rogers, 1972 |
| Ichnanthus auriculatus Swallen, 1964 |
| Ichnanthus axillaris (Nees) Hitchc. & Chase, 1917 |
| Ichnanthus bacularius Swallen, 1964 |
| Ichnanthus bradei K.E. Rogers, 1972 |
| Ichnanthus breviacuminatus K.E. Rogers, 1973 |
| Ichnanthus brevipaniculatus K.E. Rogers, 1972 |
| Ichnanthus brevivaginatus Swallen, 1953 |