Rumex acetosa is
a dioecious perennial herb of 0.3-1m in height, commonly seen in
grasslands, paths between paddies, or roadsides. Leaves are
approximately 10cm long, in a long-oblong-like lanceolate shape,
with the bases generally sagittate; the grounds of the upper parts
embrace stems. Stem's tips emerge racemes conically and set many
small, about 3mm across flowers in them. The female flower's inner
perianth lobes become significant in a wing way, embracing achenes.
Bloom time: May-August.