Abstract: Inner Mongolia Baotou, Bayannur and Tongliao of Apocynum seed morphology and seed coat the surface microstructure were observed,the results show that different Apocynum seeds exist distinct difference among length of seed, wide of seed,thickness of seed,magnitude exponent of seed ,1000-seed weight,pro-portion of seed coat,floss length of seed and floss count of seed.Veins of seed coat are not obvious difference,and through a plenty of observes found it owned stability.