"Genus: Tradescantia L."Germplasm Resources Information Network. United States Department of Agriculture. 2004-08-10. Archived from the original on 2011-06-05. Retrieved 2011-03-20.
USDA, NRCS (n.d.). "Tradescantia". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 14 December 2015.
web.archive.org
"Genus: Tradescantia L."Germplasm Resources Information Network. United States Department of Agriculture. 2004-08-10. Archived from the original on 2011-06-05. Retrieved 2011-03-20.