About polymorphism Filipendula vulgaris and F. ulmaria (Rosaceae) at West Ural

There were investigated sex structure of inflorescences of Filipendula vulgaris Moench and F. ulmaria (L.) Maxim. These types are peculiar to andromonoecy, but F. vulgaris has androdioecy too. The number of bisexual flowers at andromonoecious plants is more then at staminate ones. The diameter of corolla and pollen fertility of staminate flowers are less then at bisexual flowers of hermaphrodite and andromonoecious individuals. The presence of sterility at staminate flowers reduces the setting of fruits at andromonoecious individuals.