"Marubano-Horoshi" plants are in bloom by the tea house. They are vine-like perennial plants in the Solanaceae family that commonly grow along forest edges. Closely related species such as "Hiyodorijougo" and "Yama-Horoshi" look similar, but "Marubano-Horoshi" can be distinguished from them by its hairless stems and leaves and the green color at the base of its flowers.