Studies on the Embryogeny of the Solanaceae. I

In the light of Souèges' theory, the development of the embryo from the zygote has been studied in Physalis minima, Withania somnifera, Nicotiana plumbaginifolia, and Petunia nyctaginiflora. 2. The generalization made by Souèges, that the four cells of the four-celled proembryo always give rise to the same part of the mature embryo, seems to be untenable in the light of this investigation. 3. The variation in the development of the embryo in the Solanaceae and Umbelliferae appears to be the same.