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

References

• Fernald, M. 1950. Manual (ed. 8) i–lxiv, 1–1632. American Book Co., New York.
• Flora of China @ eFloras.org
• Flora of China Editorial Committee. 1994. Fl. China 17: 1–378. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
• Hilty, J. Editor. 2010. Insect Visitors of Illinois Wildflowers. World Wide Web electronic publication. flowervisitors.info, version (09/2010).
  See: Abbreviations for Insect Activities, Abbreviations for Scientific Observers, References for behavioral observations
• Image metadata at Bioimages (http://bioimages.vanderbilt.edu/)
• Jørgensen, P. M. & C. Ulloa Ulloa. 1994. Seed plants of the high Andes of Ecuador---A checklist. AAU Rep. 34: 1–443.
• Jørgensen, P. M. & S. León-Yánez. (eds.) 1999. Catalogue of the vascular plants of Ecuador. Monogr. Syst. Bot. Missouri Bot. Gard. 75: i–viii, 1–1181.
• 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.
• Marticorena, C. & M. Quezada. 1985. Catálogo de la Flora Vascular de Chile. Gayana, Bot. 42: 1–157.
• Zuloaga, F. O., O. Morrone, M. J. Belgrano, C. Marticorena & E. Marchesi. (eds.) 2008. Catálogo de las Plantas Vasculares del Cono Sur (Argentina, Sur de Brasil, Chile, Paraguay y Uruguay). Monogr. Syst. Bot. Missouri Bot. Gard. 107(1): i–xcvi, 1–983; 107(2): i–xx, 985–2286; 107(3): i–xxi, 2287–3348.