| Micrograph No. | Family | Scientific name and Author(s) | Aperturation | Ornamentation |
| 499 | Boraginaceae | Cordia boissieri A. DC. | tricolporate | striate |
| 500, 501 | Anacardiaceae | Toxicodendron radicans (L.) Kuntze | tricolporate | striate |
| 502, 503, 504 | Gentianaceae | Sabatia campestris Nuttall | tricolporate | striate |