Japanese name: ギシギシ Scientific name:Rumex japonicus
[Overview]
A perennial 30–120 cm tall, found along roadsides and in vacant lots.
It has thick yellow roots.
The stem is not reddish, erect, and branches in the upper part.
There are basal leaves and stem leaves; the basal leaves often remain during the flowering season.
The stem leaves are simple and alternate, 10–35 cm long and 4–12 cm wide, oblong to oblong-lanceolate, with somewhat wavy margins and petioles.
The flowers are borne in a panicle-like inflorescence and have bracts.
The flowers are small and have no petals.
The sepals are winged, ovate-cordate to pentagonal-reniform, with low teeth on the margin and a knob-like projection in the center.
The fruit is an achene.
