Japanese name: ナガバヤブマオ（長葉藪麻苧） Scientific name:Boehmeria sieboldiana
[Overview]
A perennial 1–2 m tall, found in the mountains.
The stem branches, and its base sometimes becomes somewhat woody.
The leaves are simple and opposite, ovate-oblong to narrowly ovate, about 10–20 cm long, with a long tail-like pointed tip; the upper surface is somewhat glossy and the margins have even serrations.
The leaves are somewhat thin in texture.
There are male flowers and female flowers.
The male inflorescences are borne in the leaf axils on the lower part of the stem and are conical.
The female inflorescences are borne in the leaf axils on the upper part, forming spikes in which spherical clusters of female flowers are strung together like beads.
The fruit is an achene; short hairs are present only on the upper part of the persistent perianth, and the lower part is hairless.
