Japanese name: ヒメシロネ（姫白根） Scientific name:Lycopus maackianus
[Overview]
A perennial 30–70 cm tall, found in mountain wetlands.
It has white underground stems.
The stem is erect and square in cross section; it is sparsely hairy throughout or hairless except at the nodes.
Leaves are opposite; those from the middle of the stem upward are broadly lanceolate to lanceolate, 4–8 cm long and 0.5–1.5 cm wide.
Leaves on the lower part of the stem are pinnately divided.
The leaves are thick and glossy on the upper surface, with sharp teeth along the margin.
There is a very short leaf stalk, and the boundary between the leaf base and the stalk is distinct.
White lipped flowers about 4 mm long are borne densely in the leaf axils.
The calyx is divided about halfway into 5 lobes with thorn-like pointed tips.
The fruit is a schizocarp.
[Notes]
It is a food plant of the Japanese blue leaf beetle (Oo-ruri-hamushi).
