In order to find the internal characters of Veratrum Genus, we have studied the Veratrum coreanum Loes, fil. (Lilliaceae), V. grandiflorum, and V. Versicolor Nakai f. albidum Nakai. As a results of anatomical view, we found the notable characteristic demarcation at the stele. The Veratrum coreauum Loes, fil. was the best thickened the cell membrane in the pith portion among other species in Korea.