Prostrate pigweed

Amaranthus blitoides S. Wats.

Life cycle

Prostrate, mat-forming summer annual.


Alternate and pale green to shiny, dark green leaves are oblong, oval to egg-shaped with pointed, rounded to slightly indented leaf tips. Leaf margins are smooth and usually whitish. Leaves are numerous at the stem ends.

prostrate pigweed seedling
Prostrate pigweed seedling.


Prostrate and nearly smooth, light green to reddish stems form thick, circular mats. Stems may be 1 to 3 feet long and mostly erect at the tip.

prostrate pigweed stem
Prostrate stem and shiny green foliage of prostrate pigweed.

Flowers and fruit

Small, greenish flowers are found in dense clusters in the leaf axils. Flowers have bracts as long as the sepals and yield small, round, shiny black seeds.

prostrate pigweed flowers
Prostrate pigweed foliage and flower clusters.



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The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the AgBioResearch, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.