Palynological studies in the family Melastomataceae from Thailand

Abstract

The pollen morphology of 86 species belonging to 19 genera of the Melastomataceae in Thailand was examined by both light‐ and scanning electron microscopy. Three pollen groups and five pollen types could be established: Group 1 has one type, Pternandra type, with tricolporate pollen. Group 2 comprises two heterocolpate pollen types with subsidiary colpi, the Anerincleistus and the Diplectria types and Group 3 comprises two heterocolpate pollen types, the Blastus and the Pachycentria types, with intercolpar concavities. A key for the identification of these pollen types as well as the possible phylogenetic trends is presented.