Japanese name: サワルリソウ（沢瑠璃草） Scientific name:Ancistrocarya japonica
A perennial 50–80 cm tall, growing in the shade of trees in the mountains.
The stem is erect and has short appressed hairs.
Leaves are simple and alternate, clustered around the middle of the stem, oblong, 10–20 cm long and 3–7 cm wide, with the base narrowing into the stem.
There are 3–5 pairs of lateral veins, and the underside of the leaf has appressed hairs.
There is no petiole.
Flowers are borne sparsely in a raceme at the stem tip.
The corolla is tubular-bell-shaped, 10–13 mm long, usually blue-purple but sometimes white.
The fruit splits into mericarps that are grayish white, 8–10 mm long and glossy, with the tip extending long and bending into a hook.
