Pollen morphological ultrastructure of Melastoma L. (Melastomataceae)

Melastoma L. is a type genus of Melastomataceae. Melastoma malabthricum is the type with the widest area of spread compared with other species in the genus Melastoma. This research aim to study pollen morphological ultrastructure of Melastoma. Research carried out with collecting species which include to Melastoma with survey methode. Pollen morphological ultrastructure observation used Scanning Electron Microscope Type JSM-IT-200. Pollen sample obtained from the flowers collection where not yet anthesis. In Laboratory  polen was fixation, dehidration and coating then observed with electrone microscope to taken pollen photo and identification. Two species are prolate spheroidal that are M. malabathricum dan M. tebauchina. Four species are oblate spheroidal that are M. setigerum, M. baccarianum, M.minahasae dan M. malabathricum var. malabathricum. The results scanning electron microscope from six species Melastoma seen only have aperture like a gap called colpus with amount variation. Pollen ornamentation on six species Melastoma looks like striate type.