In this study, flora of Ambarlik plateau (Rize/Turkiye), rare and endemic taxa and their threat categories was investigated. During the study, 286 taxa and 152 genera belonging to 44 families were identified. Six of the identified taxa are from the Pteridophytes group and the remaining 280 taxa from the Spermatophyte group. The latter group includes two Gymnosperm species and 278 Angiosperm. Out of the 278 taxa, 224 belong to Magnoliopsida and 54 to the Liliopsida classes. The endemism ratio of the taxa is around 9.09% and the threatened species is around 10.14%.