1. The order of the development of the floral parts of Scrophularia marylandica is calyx, stamens, corolla, and pistil. The stamens and the corolla arise from a common outgrowth. 2. The archesporium of the megaspore consists of a single hypodermal cell, which functions as a megaspore mother cell. 3. The megaspore mother cell by two successive divisions gives rise to an axial row of four potential megaspores; the embryo sac arises from the chalazal one, while the other three degenerate. 4. The mature embryo sac contains one egg, two large synergids, an endosperm nucleus, and three antipodal nuclei which soon degenerate. 5. A secondary endosperm nucleus, which grows larger as it migrates toward the egg, was observed. A polar nucleus from the chalazal end was seen to fuse with a polar nucleus from the micropylar end. 6. The first division of the fertilized egg is transverse, and is followed by a longitudinal division of the chalazal nucleus, while the other nucleus fails to divide until later. 7. The nucellu...