Abstract:With the help of LM and SEM, leaf epidermal structure was studied in l0 species of Annonaceae．Epidermal cells of them are polygonal and nearly isodiametric or irregular in outline with straight, arched，sinuolate， undulate or sinuate anticlinal walls．In Fissistigma oldhami and F. uonicum，the outer periclinal walls of abaxial epidermal cells are papillate．Druses or prismatic crystals are found in some epidermal cells of some species． The stomata in 9 species are restricted to abaxial surface, only stomata in Artabotrys hexapetalus are distributed on both adaxial and abaxia1 sides．The mature stomata of 10 species are paracytic with 2-6 subsidiary cells． Contiguous and abortive stomata are also observed in some species．Simple unicellular ，umseriate of biserlate multicellular ，clavate and stellate (tufted) trichomes are present on different surfaces in 9 species except Annona glabra，the surfaces of which are glabrous． All characters of the leaf epiderm al structure as mentioned above are of significance in the identification of some taxa at specific or generic level， and in probing their systematic relationship．