The hairy crabweed (Fatoua villosa) belongs to Moraceae (the Mulberry family). It is an annual herb that is native from Honshu to Shikoku and Kyushu in Japan, as well as the Korean Peninsula and north-eastern China. This herb grows in roadsides, dry fields or waste lands, and can reach 30-60 cm in height. The stems and leaves are covered with hairs. The stems are occasionally tinged dark purple. The leaves are ovate, opposite with coarsely toothed edges. Both male and female flowers bloom on the axils from September to October.