Abstract: The micromorphologic features of the seed coats of Larix gmelini from eighteen places were observed under Scanning electron microscope. The dorsal ornamentation of the seed coats are all striped and retioculate. The ventral ornamentation are similar to the cerebelloid. There are three types morpha around seed pores and the ornamentation are striped and wrinkly. The or namentations are relatively stable in species, but the varia tion of the ventral ornamentation are wider than the dorsal ornam entation. The or namentation of the seed coats can be regarded as one of the bases for seeds identification of Larix gmelini.

Key words: Larix gmelini, Ornam entation of the seed coats, Scanning electro nmicroscope(SEM)