Slim amaranth (smooth pipweed)
Amaranthus hybridus

An annual 1 to 6 feet in height, erect, branched above. Leaves are alternate, petioled, 3 to 6 inches long, dull green, rough, hairy, ovate or rhombic, with wavy margins. Flowers are small, with greenish or red terminal panicles. Taproot is long, fleshy, red or pink.