Abstract: An unusual developmental pattern of stigma was observed in six Clematis species(Clematis tangutica(Maxim.) Korsh., Clematis fruticosa Turcz., Clematis glauca Willd., Clematis gracilifolia Rehd. et Wils., Clematis argenfilucida(Levl. et Vant.) W.T.Wang, Clematis brevicaudata DC.) by scanning electron microscopy. The stigmas of Clematis flowers were on the ventral sides of the styles, and developed into stigmatic papillae by cells along the ventral slits. The shape of papillae change along with the development of stigma. During anthesis, the receptive surfaces matured in a sequence from the apical towards the basal ends of the styles. Stigma development pattern is functionally concerted with other floral design. Our study will be a new field of vision to understand the evolution of stigma in pollen capture with a reference value in breeding and cultivation of ornamental Clematis species.