is an annual herb, 5-15cm in height, found in damp places in
forests. Stems are weak, light green, with branches at lower parts,
and leaves are small, 5-15mm in length, orbicular-ovate, with three
prominent veins on them. Male and female flowers, light green,
mingle at leaf axils and grow to compact masses; male flowers are 4
in both perianth segments and stamens, and female flower's tepals
are 2 in all. Bloom time: March-July.