The bristles on the flower stalk are produced by duplicate factors, though they may exhibit some fluctuation in the manifestation of their phenotype and give more or less a higher ratio of the smooth stalk in the segregating generation. The crapy corolla behaves as a simple recessive to the normal condition, but its ratio in the segregating generation is almost always somewhat lower than the simplest requirement. The serrate petal acts as a dominant over the entire one, while its segregating ratio exhibited much variability in our experiments. We have some evidence to recognize the occurrence of modifiers affecting the degree of serration, though the F3 examination showed the fact the main part of variability is due to the environmental condition. The double flower is a recessive character to the single, but its segregation is usually very low in proportion. The genetic nature of the double, therefore, is not simple. Besides the ordinary recessive double, we have met with a dominant one, which gives quite contrary result in crossing with a single.