About sexual polymorphism in genus Prunella L

We studied sexual structure, anthecology and seed production in natural populations of two gynodioecic species: Prunella vulgaris L. and P. grandiflora (L.) Jacq. The population of Prunella grandiflora had a small part of female plants (less than 1%). The part of female plants in the population of Prunella vulgaris varied from 1% (in forest steppe Chernozemie) to 1% - 25% (in Priuralie). Bisexual flowers of these species had a weak proterandria and probability of combination of allogamy and autogamy. The evidence is the probability of seed formation while isolation of generative shoots. This experiment showed varying degrees of self-compatibility of these plants. Such difference result in different seed production in natural and experimental conditions. Prunella grandiflora is recommended for landscaping in Priuralie.