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Yama-tsutsuji" (Rhododendron kaempferi var. kaempferi) belongs to Ericaceae (the Azalea family). It is a small semi-evergreen tree that is distributed southward from southern Hokkaido to Honshu, Shikoku and Kyushu in Japan. This tree grows from hills to mountain forests and forest edges, and can reach 1 to 3 m in height, but the color and shape of flowers vary, and many varieties are known. The flowers of "Murasaki-yama-tsutsuji" are magenta. It is uncertain whether it has been confirmed as a variety, such as "Shiro-yama-tsutsuji" (Rhododendron kaempferi var. kaempferi f. album)". There is also a "Usumurasaki-yama-tsutsuji" (Rhododendron kaempferi var. kaempferi f. purpurellum) collected by Mitsuyoshi Muramatsu in the Bena district of Ikuta, Matsukawa Town, Nagano Prefecture in 1932, but the details are unknown.
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