Bumblebees and pollination of endemic Onobrychis pindicola (Fabaceae) in the subalpine habitats of Pirin Mts
Onobrychis pindicola subsp.urumovii Degen & Dren.is an endemic with restricted distribution on Pirin Mts.and Slavjanka Mts.(Balkan Peninsula, SW Bulgaria).It is obligatorily dependent upon Exfoliating Gloves insect vectors for pollen transport, being a self-incompatible plant.The aim of this study was: 1) to identify which bumblebees pollinate Onob