Amaranthus powellii S.Watson, green pigweed, amarante de Powell An annual herb, with erect stems from 1 to 6 ft. (3 to 18 dm.) tall, that reproduces by seed. It has a long, narrow, terminal spike. This contrasts with the relatively short, thick, and compact spike of redroot pigweed. Green pigweed probably was originally a native of the southwestern United States and adjacent Mexico, but it has now become naturalized as a weed in agricultural fields, gardens, roadsides, railways, and waste places in most of the United States and in the extreme southern part of Canada.
Amaranthus retroflexus L.,redroot pigweed, amarante à racine rouge
Annual, spreading by seeds; autogamous and wind-pollinated; stems 2 inches to 4 feet (5 cm. to 12 dm.) high.; flowers inconspicuous; throughout; widespread in gardens, row crops, waste places, and along roadsides; has a characteristic red root; native to North America. Poisoning and death of pigs and cattle has occurred after the ingestion of large quantities of this plant.
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| Weed Name | Photo | Weed Name | Photo | |
| green pigweed, amarante de Powell |  |
green pigweed, amarante de Powell |  |
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| green pigweed, amarante de Powell (seedling) |  |
redroot pigweed, amarante à racine rouge |  |
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| redroot pigweed, amarante à racine rouge |  |
redroot pigweed, amarante à racine rouge (young plant) | .JPG) |
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| redroot pigweed, amarante à racine rouge (seedling) | .JPG) |
redroot pigweed, amarante à racine rouge (NC) |  |
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