| Micrograph No. | Family | Scientific name and Author(s) | Aperturation | Ornamentation |
| 451, 452 | Rosaceae | Rosa setigera Michaux | tricolporate | striate |
| 453, 454 | Loasaceae | Mentzelia nuda (Pursh) Torrey & Gray | tricolporate | striate |
| 455, 456 | Rosaceae | Pyrus communis L. | tricolporate | striate |