aerobiological investigation and in vitro studies of pollen grains from 2 dominant avenue trees in kolkata, india. | peltophorum pterocarpum and delonix regia are dominant avenue trees in the city of kolkata in india. they are well adapted to the humid tropical climate and also grow commonly in different parts of the country. their pollen grains are reported to be airborne. | 2008 | 18361098 |