| Pediomelum castoreum (S. Watson) Rydb., 1919 |
| Pediomelum cuspidatum (Pursh) Rydb., 1919 |
| Pediomelum esculentum (Pursh) Rydb., 1919 |
| Pediomelum humile Rydb., 1919 |
| Pediomelum palmeri (Ockendon) J.W. Grimes ex Gandhi, 2015 |
| Pediomelum pentaphyllum (L.) Rydb., 1919 |
| Pediomelum rhombifolium (Torr. & A. Gray) Rydb., 1919 |
| Pediomelum sonorae Rydb., 1919 |
| Pediomelum tenuiflorum (Pursh) A.N. Egan, 2009 |
| Pediomelum trinervatum Rydb., 1919 |
| Peiranisia Raf., 1838 |
| Peiranisia biflora (L.) Pittier, 1928 |
| Peiranisia chiapensis (Standl.) Britton & Rose, 1930 |
| Peiranisia doylei Britton & Rose, 1930 |
| Peiranisia gaumeri Britton & Rose, 1930 |
| Peiranisia holwayana (Rose) Britton & Rose, 1930 |
| Peiranisia multijuga (Rich.) Britton & Rose ex Britton & P. Wilson, 1926 |
| Peiranisia orcuttii Britton & Rose, 1930 |
| Peiranisia simulans Britton & Rose, 1930 |
| Peiranisia yucatensis Britton & Rose, 1930 |