Common waterhemp

Amaranthus rudis

This plant is a summer annual; it is highly variable in size, ranging from 2-8' tall. Larger plants branch frequently and are broader at the base than at the top. The hairless stems are either round or ridged, and green or pinkish red. The hairless alternate leaves are up to 6" long and 1½" across. They are lanceolate, ovate-lanceolate, or oblong, with smooth margins and a somewhat shiny upper surface. The petioles are long and narrow, sometimes as long as the leaves, but usually shorter. The flowers are arranged in spikes, or narrow panicles of spikes, up to 1' long. These spikes may develop directly from the upper branches, or they may appear from the axils of the upper leaves.

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