Amaranthus hybridus, commonly called Smooth Amaranth, Smooth Pigweed, Red Amaranth, or Slim Amaranth, is a species of annual flowering plant. It is a weedy species found now over much of North America and introduced into Europe and Eurasia.
grows from a short taproot
and can be up to 2.5 m in height. It is a glabrous
was originally a pioneer plant
in Eastern North America
. It has been reported to have been found in every state except Wyoming
, and Alaska
. It is also found in many provinces of Canada
, and in parts of Mexico
, the West Indies
, Central America
, and South America
. It has been naturalized in many places of warmer climate. It grows in many different places, including disturbed habitats.
It is extremely variable, and it is believed that many other Amaranthus
species are natural hybridizations or derive from A. hybridus
As a weed
Although easily controlled and not particularly competitive, it is recognized as a harmful weed of North American crops.
The plant was used for food and medicine by several Native American groups.