- ↑ Checklist of CITES Species Part 1 CITES species index, 2011
- ↑ Flora of North America Editorial Committee, eds., 2003 Flora of North America North of Mexico, vol. 4: Magnoliophyta: Caryophyllidae, part. 1, The volumes are also reproduced online (http://www.fna.org/)
- ↑ 3.0 3.1 Roskov Y., Kunze T., Orrell T., Abucay L., Paglinawan L., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Decock W., De Wever A., Didžiulis V. (ed) (2014). "Species 2000 & ITIS [[Catalogue of Life]]: 2014 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 26 Mayo 2014. CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ (Canada);http://siit.conabio.gob.mx (Mexico) ITIS Global: The Integrated Taxonomic Information System