- ↑ database, NODC Taxonomic Code, 1996
- ↑ Lamiales of North America Update, 2011
- ↑ database, The PLANTS Database, 2000
- ↑ database, The PLANTS Database, 1996
- ↑ database, Germplasm Resources Information Network (GRIN) Taxonomy Database, 2003
- ↑ Flora of the West Indies website, 2007
- ↑ Munir, Ahmad Abid, (1992) A taxonomic revision of the genus Stachytarpheta Vahl (Verbenaceae) in Australia Journal of the Adelaide Botanic Garden, vol. 14, no. 2
- ↑ 8.0 8.1 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 Regional: The Integrated Taxonomic Information System