| Prunus virginiana L., 1753 |
| Prunus zinggii Standl., 1936 |
| Purshia DC. ex Poir., 1816 |
| Purshia ericifolia (Torr. ex A. Gray) Henrickson, 1986 |
| Purshia mexicana (D. Don) S.L. Welsh, 1986 |
| Purshia plicata (D. Don) Henrickson, 1986 |
| Purshia stansburyana (Torr.) Henrickson, 1986 |
| Pyracantha M. Roem., 1847 |
| Pyracantha coccinea M. Roem., 1847 |
| Pyracantha crenulata (D. Don) M. Roem., 1847 |
| Pyracantha koidzumii (Hayata) Rehder, 1920 |
| Pyrus L., 1753 |
| Pyrus communis L., 1753 |
| Pyrus guerreris (J.B. Phipps) M.F. Fay & Christenh., 2018 |
| Pyrus jupiter M.F. Fay & Christenh., 2018 |
| Pyrus malus L., 1753 |
| Pyrus matudae (Lundell) M.F. Fay & Christenh., 2018 |
| Pyrus mexicana (Baill.) M.F. Fay & Christenh., 2018 |
| Pyrus pumila (Mill.) Steud. 1821 |
| Rhaphiolepis Lindl., 1820 |