The sex structure of populations and seed productivity of Stachys palustris L. s. l. in the Urals

We studied the sexual structure of populations, anthecological features and the seed production of Stachys palustris L. s.l., Lamiaceae in the Urals (also the Priuralie and Trans-Urals). This is en-tomophilous xenogamic plant. Seeds are not appeared in isolation. In Perm region the plant forms with different flowers show different level of seed production. It is higher in plants with white flowers than in plants with purple flowers. This phenomenon should be studied more.