USDA, NRCS (n.d.). "Utricularia macrorhiza". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2008-12-28.
wikipedia.org
en.wikipedia.org
USDA, NRCS (n.d.). "Utricularia macrorhiza". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 2008-12-28.