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The root system is composed of a highly branched taproot.

Redroot pigweed (Amaranthus retroflexus)

Redroot pigweed (Amaranthus retroflexus)

Redroot pigweed (Amaranthus retroflexus) has a taproot which is red near the soil line, hence the name.

Redroot pigweed (Amaranthus retroflexus)


Pigweed also often have red stems near the soil line.  Often the red color occurs in an interesting striation pattern.

Redroot pigweed (Amaranthus retroflexus)



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