Pollination ecology of Haberlea rhodopensis friv. (Gesneriaceae), A tertiary relict endemic to the Balkan Peninsula

This study presents preliminary results on the pollination strategy and re-productive success of the tertiary relict and endemic species Haberlea rhodopensis Friv., Gesneriaceae in a highly fragmented habitat in Bulgaria and Greece. The flowers of the species receive very scarce insect visits, mainly from non-specialized insects. The species is obviously not attractive to honeybees and bumblebees and we could not find a specific pollinator. Flowers offer pollen and scarce nectar as a reward. Pollination success is characterized by high seed production and rate of pollination.