Abstract
The pollen grains and the flowers of some genera representative of the tribes and subtribes of Gesnerioideae will be studied: Anetanthus Hiern ex Benth. & Hook.f., Asteranthera Hansl., Bellonia L., Besleria Plum. ex L., Coronanthera Vieill. ex C.B.Clarke, Depanthus S.Moore, Diastema Benth., Drymonia Mart., Episcia Mart., Gasteranthus Benth., Gesneria L., Mitraria Cav., Napeanthus Gardner,…