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Taxonavigation: Lamiales 
Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Euasterids I
Ordo: Lamiales

Familia: Plantaginaceae
Tribus: Gratioleae
Genus: Otacanthus
Species (7 sensu Rose (2001)):
O. azureus – O. caeruleus – O. caparaoensis – O. crenatus – O. fernandesii – O. platychilus – O. villosus


Note: There is uncertainty regarding the circumscription of this genus with many species reported as synonyms in Achetaria and the others as unresolved.


  • Lindley, J.D. (1862) Journal Général d'Horticulture 15: 55.
  • Ronse, A. (2001) A revision of Otacanthus Lindl. (Scrophulariaceae), Brittonia, 53(1): 137–153.
  • The Plant List 2013. Otacanthus in The Plant List Version 1.1. Published on the internet. Accessed: 2014 May 31.
  • Tropicos.org 2014. Otacanthus . Missouri Botanical Garden. Published on the internet. Accessed: 2014 May 31.
  • International Plant Names Index. 2014. Otacanthus. Published online. Accessed May 31 2014.