rough pigweed Directory References Discover 10 Best Hockey Players of All Time Titanosaurs: 8 of the World's Biggest Dinosaurs 9 American Political Scandals Why Was Nazi Germany Called the Third Reich? Why Do Bananas Turn Brown? 12 Novels Considered the “Greatest Book Ever Written” Why Is the Indy 500 Held on Memorial Day Weekend? Contents rough pigweed plant Also known as: Amaranthus retroflexus, redroot Learn about this topic in these articles:pigweed In pigweed…base of the leafstalks; and rough pigweed, or redroot (A. retroflexus), is a stout plant up to 3 metres (about 10 feet) tall.Read More