. . . . . . . . . "Eurema mexicana mexicana" . . "Helminthotheca echioides" . . "Alfonso Gutiérrez Aldana. 2010. Eurema mexicana mexicana nectar plant Helminthotheca echioides. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6116920> 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." .