References
For Nymphaea
Borsch, T., J.H. Wiersema, C.B. Hellquist, C. Löhne, and K. Govers. 2014. Speciation in North American water lilies: evidence for the hybrid origin of the newly discovered Canadian endemic Nymphaea loriana sp. nov. (Nymphaeaceae) in a past contact zone. Botany 92: 867-882. Google Scholar
Borsch, T., K.W. Hilu, J.H. Wiersema, C. Löhne, W. Barthlott, and V. Wilde. 2007. Phylogeny of Nymphaea (Nymphaeaceae): evidence from substitutions and microstructural changes in the chloroplast trnT-trnF region. Int. J. Plant Sci. 168: 639-671. Google Scholar
Schneider & Williamson. 1993. In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp. Google Scholar
Wiersema, J.H. 1997b. Nymphaea. In Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Volume 3, Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York, NY. 590 pp. Google Scholar
Woods, K., K.W. Hilu, J.H. Wiersema, and T. Borsch. 2005a. Pattern of variation and systematics of Nymphaea odorata: I. Evidence from morphology and inter-simple sequence repeats (ISSRs). Systematic Botany 30: 471-480. Google Scholar
Woods, K., K.W. Hilu, T. Borsch, and J.H. Wiersema. 2005b. Pattern of variation and systematics of Nymphaea odorata: II. Sequence information from ITS and trnL-trnF. Systematic Botany 30: 481-493. Google Scholar