Distribution: Introduced and common in most of the world.
Habitat: Along highways, railroads, and in waster areas, but also in open or lightly wooded undisturbed areas, from the lowlands to moderate elevations in the mountains.
Flowers: May - August
Conservation Status: Not of concern
Dioecious, glabrous perennial from widely spreading, slender rhizomes, the 1-several stems 2-3 dm. tall, unbranched below the inflorescence.
Leaves with sheathing stipules, petiolate, numerous, highly variable, the blades 2-4 cm. long, linear to ovate, usually with spreading, basal, triangular lobes.
Inflorescence an open, leafless, reddish, narrow panicle; flowers imperfect; pedicels slender, longer than the flowers, jointed immediately under the flower; perianth about 1 mm. long, erect, only slightly larger than the fruit and closely investing it; styles 3.