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

References

  • Bailey, L.H., E.Z. Bailey, and the L.H. Bailey Hortatorium. 1976. Hortus Third: A concise dictionary of plants cultivated in the United States and Canada. New York: Macmillan. pp. 385–386.
  • Burger, W.C. & K.A. Barringer. 2000. Family 193. Scrophulariaceae. 41: 1–69. In W.C. Burger (ed.) Fl. Costaricensis, Fieldiana, Bot. Field Museum of Natural History, Chicago.
  • Cornell University. 2012. Plants poisonous to livestock: Digitalis purpurea. Retrieved 21 March 2012 from http://www.ansci.cornell.edu/plants/digitalis.html..
  • Idárraga-Piedrahita, A., R. D. C. Ortiz, R. Callejas Posada & M. Merello. (eds.) 2011. Fl. Antioquia: Cat. 2: 9–939. Universidad de Antioquia, Medellín.
  • Luteyn, J. L. 1999. Páramos, a checklist of plant diversity, geographical distribution, and botanical literature. Mem. New York Bot. Gard. 84: viii–xv, 1–278.
  • Olmstead, R. G., C.W. dePamphilis, A.D. Wolfe, N.D. Young, W.J. Elisons, and P.A. Reeves. 2001. Disintegration of the Scrophulariacea". American Journal of Botany 88 (2): 348–361. Retrieved 21 Mar 2012 from http://www.amjbot.org/content/88/2/348.full.
  • Species Plantarum 2: 621. 1753. (1 May 1753) (Sp. Pl.)

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