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Prostrate Pigweed (Amaranthus albus L.)

Also known as white amaranth, tumble pigweed, tumbleweed amaranth.

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A summer annual that forms tumbleweeds on larger plants. Native to the tropical Americas, and introduced into North America as well as other continents. Now occurs across North America.

Range - Expand

Native or Not Present
Native or Expanded
Expanded or Not Present
Native or Expanded or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

The exact native range of this species is not known and different sources give different cutoffs. POWO considers it native to the southern US coast-to-coast, and northern Mexico, and having expanded northward, whereas BONAP considers it native to the Great Plains and having expanded east and west. We have not yet resolved this issue but for now, our map loosely reflects BONAP's scheme because they are often more accurate than POWO on issues of range and establishment means. All sources agree, however, that this plant is native somewhere in North America and has greatly expanded its range contiguously with its native range.

This species also occurs in Canada and Mexico but we have not yet built these portions of its map.