References

For Nasturtium

Al-Shehbaz, I.A. 1988a. The genera of Arabideae (Cruciferae; Brassicaceae) in the southeastern United States. J. Arnold Arb. 69: 85-166. Google Scholar

Al-Shehbaz, I.A. 2010a. Brassicaceae. In Flora of North America Editorial Committee. 2010. Flora of North America north of Mexico. Volume 7, Magnoliophyta: Brassicaceae to Salicaceae. Oxford Univ. Press, New York, NY. 797 pp. Google Scholar

Al-Shehbaz, I.A., and R.A. Price. 1998. Delimitation of the genus Nasturtium (Brassicaceae). Novon 8: 124-126. Google Scholar

Franzke, A., K. Pollmann, W. Bleeker, R. Kohrt, and H. Hurka. 1998. Molecular systematics of Cardamine and allied genera (Brassicaceae): ITS and non-coding chloroplast DNA. Folia Geobotanica 33: 225-240. Google Scholar

Green, P.S. 1962. Watercress in the New World. Rhodora 64: 32-43. Google Scholar

Rollins, R.C. 1993. The Cruciferae of continental North America: systematics of the mustard family from the Arctic to Panama. Stanford Univ. Press, Stanford, CA. 976 pp. Google Scholar

Stuckey, R.L. 1972. Taxonomy and distribution of the genus Rorippa (Cruciferae) in North America. Sida 4: 279-430. Google Scholar