Abstract: The pollen morphology of 21 species, 17 genera and 6 families (Bretschneideraceae, Staphyleaceae, Connaraceae, Hippocastanaceae, Sapindaccae and Papaveraceae) has been examined under light microscope. 3 specics (Bre- tschneidera sinensis Hemsl.; Ellipanthiis glabrifolius Merr. and Argcmone mcxicana L.) were observed under scanning electron microscope. The present article discussed the palynological data mainly in relation to the classification and systematic position of Bretschneideraceae. The Brtschneideraceae is relatcd to the Connarceae and the Popoveraceae.

Key words: Bretschneideraceae