Japanese name: オチフジ（落藤） Scientific name:Meehania montis-koyae
[Overview]
A perennial 10–20 cm tall, found in the shade of trees in the mountains.
The whole plant has an unpleasant smell.
It has slender underground stems.
Leaves are simple and opposite, triangular-heart-shaped, 2–4 cm long and wide, with 4–8 pairs of blunt teeth.
Both surfaces of the leaves have fine hairs and are velvety, and the upper surface often has brown markings.
The underside of the leaves is often tinged with purple.
The petiole is longer than the leaf.
The flowers arise in the leaf axils; they are pale purple, labiate, and 4 cm long, with a 2-lobed upper lip and a 3-lobed lower lip.
The central lobe of the lower lip is large, curves slightly downward, and is shallowly 2-lobed; there are no spreading hairs in the throat.
The fruit is a schizocarp.
