The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • AFPD. 2008. African Flowering Plants Database - Base de Donnees des Plantes a Fleurs D'Afrique.
  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • Bailey, L.H. & E.Z. Bailey. 1976. Hortus Third i–xiv, 1–1290. MacMillan, New York.
  • Bulletin de l'Academie Royale des Sciences et Belles-lettres de Bruxelles 11(1): 237. 1844. (Bull. Acad. Roy. Sci. Bruxelles)
  • CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City.
  • Correll, D. S. & M. C. Johnston. 1970. Man. Vasc. Pl. Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.
  • Govaerts R. (ed). For a full list of reviewers see: (2013). WCSP: World Checklist of Selected Plant Families (version Oct 2011). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at Species 2000: Reading, UK.
  • Linnaea 26: 98. 1853[1854]. (Feb 1854) (Linnaea)
  • Lorence, D. H. 1999. A nomenclator of Mexican and Central American Rubiaceae. Monogr. Syst. Bot. Missouri Bot. Gard. 73: 1–177.
  • Marticorena C & R Rodríguez . 1995-2005. Flora de Chile. Vols 1, 2(1-3). Ed. Universidad de Concepción, Concepción. 351 pp., 99 pp., 93 pp., 128 pp. Matthei O. 1995. Manual de las malezas que crecen en Chile. Alfabeta Impresores. 545 p.
  • Memoir of a Tour to Northern Mexico: connected with Col. Doniphan's Expedition in 1846 and 1847 106. 1848. (Mem. Tour N. Mexico)
  • North American Flora 32: 104. 1921. (N. Amer. Fl.)
  • Nova Genera et Species Plantarum (quarto ed.) 3: 383. 1818[1819]. (Nov. Gen. Sp. (quarto ed.))
  • Nova Genera et Species Plantarum (quarto ed.) 3: 384. 1818[1819]. (Nov. Gen. Sp. (quarto ed.))
  • Repertorium Specierum Novarum Regni Vegetabilis 18: 357. 1922. (Repert. Spec. Nov. Regni Veg.)
  • Schltdl. 1854. In: Linnaea 26: 98
  • Systema Naturae, Editio Decima 893. 1758. (Syst. Nat. (ed. 10))
  • Transactions of the Linnean Society of London 29: 86, t. 51. 1873. (Trans. Linn. Soc. London)


EOL content is automatically assembled from many different content providers. As a result, from time to time you may find pages on EOL that are confusing.

To request an improvement, please leave a comment on the page. Thank you!