"Baa-sobu" (Codonopsis ussuriensis) belongs to Campanulaceae (the Bellflower family). It is a perennial herb that is native to throuout Japan, also the Korean Peninsula, northeastern China, Ussuri and Amur region. This herb grows in moors and forest edges. It is a trailing vine, twines around other plants, and can reach about 2 m long. The leaves are ovate, alternate and covered with white hairs on abaxial sides. The greenish white, bell-shaped flowers bloom descending at the terminal branches from July to September. The corolla is tinged purple on the inside surface and has dark purplish mottles at the underneath.