The male and female gametophyte development in Seseli resinosum Freyn et Sint were studied with a-light microscope. In order to study the embryology of Seseli resinosum Freyn & Synth that an endemic plant spreading in Zonguldak-Bartin region development of the seed and embryo have been examined. Embryo development of Seseli resinosum was solanad type. In the sections taken zygote, proembryo, 4-cell embryo, 8-cell embryo, spherical embryo, heart-shaped embryo stages were observed. There are differences in the participation of the integument in the formation of the testa. In Apiaceae, only the epidermis of the outer integument forms the seed coat. Since the fruit type is a schizocarp, the testa and the pericarp are inseparable. Testa was seen as 3 or 6 layers. The layers consist of thin-walled cells. The outermost layer is single row and its thickness is less than the other layers.