Amaranthus australis is also known as southern amaranth or southern water-hemp. The plant usually grows from 1 to 3 m (3.3 to 9.8 ft) in height, though some have been known to grow up to 9 m (30 ft) high. The stems can be up to 30 cm in diameter. It is a herbaceous annual. It is found in many southern states of the United States, Mexico, the West Indies, and South America. They are frequently found in wetland areas. It...