| Oreobatus trilobus (Ser.) Rydb., 1913 |
| Petrophytum (Nutt. ex Torr. & A. Gray) Rydb., 1900 |
| Petrophytum caespitosum (Nutt.) Rydb., 1900 |
| Petrophytum caespitosum var. caespitosum (Nutt.) Rydb., 1900 |
| Photinia Lindl., 1820 |
| Photinia arbutifolia Lindl., 1821 |
| Photinia guerreris J.B. Phipps, 1992 |
| Photinia japonica (Thunb.) Benth. & Hook. f. ex Asch. & Schweinf., 1887 |
| Photinia matudae Lundell, 1940 |
| Photinia mexicana (Baill.) Hemsl., 1880 |
| Photinia microcarpa Standl., 1935 |
| Photinia microcarpa subsp. hintonii J.B. Phipps, 1992 |
| Photinia oblongifolia Standl., 1929 |
| Photinia parviflora L.O. Williams, 1972 |
| Physocarpus (Cambess.) Raf., 1838 |
| Physocarpus intermedius (Rydb.) C.K. Schneid., 1906 |
| Physocarpus monogynus (Torr.) J.M. Coult., 1891 |
| Physocarpus opulifolius (L.) Maxim., 1879 |
| Physocarpus opulifolius var. intermedius (Rydb.) B.L. Rob., 1908 |
| Potentilla L., 1753 |