* [https://plants.usda.gov/plant-profile/PAOF «Parietaria officinalis L. (upright pellitory)» (en [[anglés]]). USDA Plants Database Plant Profile General. United States Department of Agriculture, Natural Resources Conservation Service] | * [https://plants.usda.gov/plant-profile/PAOF «Parietaria officinalis L. (upright pellitory)» (en [[anglés]]). USDA Plants Database Plant Profile General. United States Department of Agriculture, Natural Resources Conservation Service] |