Anthecology and seed production of the Ural species of Lamium L. (Lamiaceae)

We studied anthecological features and seed production of the Ural species of Lamium L. (L. album L., L. maculatum L., L. purpureum L., Lamiaceae). Observations were carried out in natural conditions and in-troduction. Anthecological features of the studied species have much in common. All of them have long flowering period during vegetation season. Floweres are protandrous to a small degree, but they are not homogamic as it was considered to be. They had identical stages from the opening of the flowers till wilt-ing. Flowers of different species have different lengths of staminate and pistil phases and flowering and the durations of their overlapping, that facilitates the chance of self pollination in the form of autogamy or heitonogamy. They have both cross and self pollination. L. purpureum has the greater predisposition to the self pollination than other species. Flowers of all studied species are pollinated only by long-proboscis insects. Seed production is high. The decrease of seed production was observed only in seasons with cloudy and rainy weather, that obstructed the active visits of insects-pollinators. The decrease of seed pro-duction in such seasons was greater than in dry seasons.