rough pigweed Directory References Discover 8 of the Largest Empires in History 8 Deadliest Wars of the 21st Century Was Santa Claus a Real Person? Flags That Look Alike Why Is Ireland Two Countries? 10 Famous Artworks by Leonardo da Vinci Why Is Thanksgiving in the U.S. Celebrated on a Thursday? Contents rough pigweed plant Ask the Chatbot a Question 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