Amaranthus blitoides, commonly called mat amaranth,[1] prostrate pigweed,[2] procumbent pigweed, prostrate amaranth, or matweed, is a glabrous annual plants species.

It is believed to have been a native of the central and possibly eastern United States, but it has naturalized in almost all of temperate North America.

The seeds of Amaranthus blitoides were used as a food source by a number of Native American groups.

[3] Among the Zuni people, the seeds were originally eaten raw, but later ground with black corn meal, made into balls and eaten.

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