Morphological and histological characters of the leaves and stems of 6 specics of Potcntilla (Potentilla fragarioides; P. discolor; P. chinensis; P. 'kleiniana; P. freyniana; P. anserina)are discribed and compared for the first time. Some Characters such as the form of gland ular trichomes on stems; the form of trichomes on leaves and stems; the stomatal index of lower surface of Ieaves and the palisade ratio play important roles in the differentiation am ong the 6 specics. The glandular trichome is reported for the first time.