The distribution of Aster hispidus Thunb. var. insularis (Makino) Okuyama is limited to the coastal areas of southwestern Shikoku. This species has been described as having fatter stems, thicker leaves, and glabrous stems and leaves ciliate on margin. We have found many individuals that ranged from having no hair to many hairs on the abaxial side of the leaves in this variety. We measured the number of leaf hairs, degree of herbivory, and stomatal density of leaves of A. hispidus var. insularis. Two types of A. hispidus var. insularis for the presence or absence of leaf hairs were obsereved. The degree of herbivory did not differ significantly between these two types, however, the stomatal density was lower in the hairy-leaf-type individuals than in the hairless-leaf-type individuals.