Cnidoscolus stimulosus, the bull nettle,
The green leaves of this plant are alternate, consisting of three to five dentate lobes. The large, white flowers have five petals. Male and female flowers are on different plants (monoecious). Flowers occur throughout the spring and summer followed by a small capsule that produces three large seeds. The entire plant above ground, including the flower petals, is covered with stinging hairs. The tap root can be used as an excellent potato substitute, tasting like pasta.
As the common names imply, the urticating hairs on this plant contain a caustic irritant that inflicts a painful sting to those who contact it with bare skin. It can cause a painful, irritating rash and can cause more serious reactions with some people.
Distribution and habitat
C. stimulosus is native to the southeastern United States Coastal Plains. It ranges from Louisiana and Florida north to Virginia and Kentucky, excluding Tennessee and Arkansas.
This species is found on deep, well drained, sandy soil in sparsely-canopied uplands. It also grows in disturbed areas, such as old fields, roadsides, railways, bulldozed clearings, and residential lawns.