. . . . . . . . . "Euphoria kernii" . . "Opuntia tortispina" . . "ellen hildebrandt. 2017. Euphoria kernii host plant Opuntia tortispina. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6266683> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .