The influence of light and the place of its perception on the flowering of Pharbitis nil.
The estimation of participation and density of forage species in several xerothermic communities of the Lublin Upland were carried out in 2004 and 2005.Most plants species visited by bees are grouped in plots of the Brachypodio-Teucrietum and the Adonido-Brachypodietum pinnati communities.The nectariferous and polleniferous taxons merlin wizard cos