"Genus: Portulaca L."Germplasm Resources Information Network. United States Department of Agriculture. 2011-03-04. Archived from the original on 21 July 2011. Retrieved 10 November 2011.
web.archive.org
"Genus: Portulaca L."Germplasm Resources Information Network. United States Department of Agriculture. 2011-03-04. Archived from the original on 21 July 2011. Retrieved 10 November 2011.