Japanese name: ヒメジソ（姫紫蘇） Scientific name:Mosla dianthera
[Overview]
An annual 20–70 cm tall, found at woodland edges and roadsides in hills and fields.
The stem is erect, much branched, and square in cross section.
The nodes of the stem have white hairs, and the ridges of the internodes either have sparse, short, downward-pointing white hairs or are hairless.
The leaves are simple and opposite, ovate to broadly ovate, 2–4 cm long and 1–2.5 cm wide, hairless on the upper surface and slightly hairy on the veins of the lower surface.
The leaf margins have 4–6 pairs of coarse teeth.
The petiole is 1–3 cm long.
The flowers are borne in pairs at each node and form a spike.
The flowers are pale pink to white and two-lipped, with the upper lip 3-lobed and the lower lip 2-lobed.
The calyx is sparsely hairy and 5-lobed, and the tip of the upper calyx tooth is obtuse.
The bracts are shorter than the pedicels and linear-lanceolate.
The fruit is a schizocarp with a reticulate pattern on the surface.
