References
For Pinguicula
Fischer et al. 2004. In Kadereit, J.W. 2004. The families and genera of vascular plants. VII. Flowering plants – Dicotyledons – Lamiales (except Acanthaceae including Avicenniaceae). Springer, Berlin. 478 pp. Google Scholar
Godfrey, R.K., and H.L. Stripling. 1961. A synopsis of Pinguicula (Lentibulariaceae) in the southeastern United States. American Midland Naturalist 66(2): 395-409. Google Scholar
Schnell, D.E. 1980a. Pinguicula caerulea Walt. forma leucantha: a new form. Castanea 45: 56-60. Google Scholar
Schnell, D.E. 2002b. Carnivorous plants of the United States and Canada. 2nd edition. Timber Press, Portland, OR. 468 pp. Google Scholar
Wood, C.E., and R.K. Godfrey. 1957. Pinguicula (Lentibulariaceae) in the southeastern United States. Rhodora 59: 217-230. Google Scholar