spiny pigweed

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spiny pigweed

plant

Also known as: Amaranthus spinosus, spiny amaranth

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pigweed

In pigweed
…stems rising at the tips; spiny pigweed, or spiny amaranth (A. spinosus), has spines at the base of the leafstalks; and rough pigweed, or redroot (A. retroflexus), is a stout plant up to 3 metres (about 10 feet) tall.
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