Japanese name: アカソ（赤麻） Scientific name:Boehmeria silvestrii
[Overview]
A perennial 50–80 cm tall, found in somewhat moist places in hills and fields.
The stem usually does not branch.
The stems and leaf stalks are tinged reddish brown.
The leaves are opposite, ovate-orbicular, deeply divided into 3 lobes at the tip; the lobe tips are pointed like a tail and the margins have coarse double serrations.
Three veins are conspicuous on the leaves.
There are male flowers and female flowers.
The male inflorescences arise from the leaf axils on the lower part of the stem and extend as spikes.
The female inflorescences arise from the leaf axils on the upper part of the stem, with spherical clusters of flowers forming spikes.
There are individuals that reproduce sexually and individuals that reproduce asexually.
The fruit is a flattened achene with narrow wings.
[Notes]
It resembles Kusako-akaso, but can be distinguished from it by its 3-lobed leaves.
