| Lobelioideae Burnett, 1835 |
| Nemacladoideae M.H.G. Gust., 1996 |
| Nemacladus Nutt., 1842 |
| Nemacladus australis (Munz) Morin, 2008 |
| Nemacladus glanduliferus Jeps., 1925 |
| Nemacladus longiflorus A. Gray, 1877 |
| Nemacladus orientalis (McVaugh) Morin, 2008 |
| Nemacladus pinnatifidus Greene, 1885 |
| Nemacladus ramosissimus Nutt., 1843 |
| Nemacladus ramosissimus var. pinnatifidus (Greene) A. Gray, 1886 |
| Nemacladus rigidus Munz, 1924 |
| Nemacladus rigidus var. australis Munz, 1924 |
| Nemacladus rubescens Greene, 1885 |
| Nemacladus sigmoideus G.T. Robbins, 1958 |
| Nemacladus tenuis (McVaugh) Morin, 2008 |
| Nemacladus tenuis var. tenuis (McVaugh) Morin, 2008 |
| Palmerella A. Gray, 1876 |
| Palmerella debilis (A. Gray) Lammers, 2006 |
| Palmerella debilis subsp. debilis (A. Gray) Lammers, 2006 |
| Palmerella debilis subsp. serrata (A. Gray) Lammers, 2006 |