抄録
A new species, Carex benkei is described on the basis of the specimen from Mt. Tatta-san, Kumamoto Pref., Kyushu, Japan. It is similar to C. brownii, but it differs from C. brownii in having utricles 1.4 times longer, being stipitate at the base, having a beak two times longer, the beak of the achene with or rarely without an annular appendage and the pistillate scales, excluding the awn, two times longer. It is also similar to C. transversa, but it differs in having bidentate, stipitate utricles, the beak of the achene with or rarely without an annular appendage, pistillate scales about two times longer, excluding the awn, and basal sheaths light brown. Carex benkei occurs in Japan (Honshu, Shikoku and Kyushu) and China (An-hui Province). A distribution map of the species is given. A key to the three similar species is presented.
