Abstract: Pollen morphology of Opithandra Burtt has been examined with LM and SEM. The pollen grains suhsphercidal, slightly long. and oblate, 3-colporoidate (most species). and 4-colporoidate(only one species, Opithandra primuloides). Exine reticulate, muri smooth or spinulate. According to width and clear degree of muri, and shape of lumina, pollen grains of this genus may be divided into three groups as follows. 1. Primuloides group including O. sinohenryi, O. primuloides and O. fargesii:muri wide, smooth, width of muri uneven. 2. Dalzielii group including O. dalzielii, O. obtusidentata, O.dinghushanensis and O. cinerea:muri narrow, smooth or with spinules. 3. Acaulis group with only one species, i. e. O. acaulis:reticulation obscure, and spinulate ornamentation distinct.