Experiments were carried out in 2006-2008 on Lysimachia vulgaris L. plants from tw natural and one cultivated populations. The following features were determined: mea number of capsules per shoot, mean number of capsules per shoot with respect to thre different levels of fruit localization in the inflorescence, seed breadth, length and germ nability. Mean number of fruits per shoot was significantly higher for cultivated plant in comparison with plants growing in natural populations. Both cultivated plants an those growing in natural habitats formed significantly more fruits in the middle part c the inflorescence in comparison with bottom and top parts of the inflorescence. Mea number of seeds per capsule depended on the fruit localization in the inflorescenc and was the highest for capsules located in the middle part of it. The seed size and gei minability after the final count depended on seed localization on a plant. The highes germinability was observed for seeds of cultivated plants produced in the middle par of the inflorescence.