Amaranthus crassipes, also known as spreading amaranth, is a glabrous annual plant that is both native and introduced in the United States. In the U.S., it is found in New Mexico, Arizona, Texas, Alabama, South Carolina, and Louisiana. It is also found in Mexico, the West Indies, and South America. The plant can grow up to 2 feet in height. It flowers in the summer and fall. It is usually found near wet habitats or disturbed areas.