Rough/Redroot Pigweed

Rough weed, Redroot Pigweed, Amaranthus retroflexus, Amaranthaceae, Weed Pollen


Amaranthus retroflexus




Tropical America and introduced throughout the United States


This weed is an annual species that reproduces by seed and may establish itself aggressively in cultivated fields. It can get to be six feet tall with bristly-looking greenish flowers clustered along the sides and top of the plant during late summer and autumn. This pigweed gets one of its common names from the reddish color at the upper portion of the taproot. However, there are many species of amaranth, and they cross-react allergenically.

Get Adobe Reader
Please see PDF for additional information.