For Ruppia
Crow, G.E., and C.B. Hellquist. 2023. Aquatic and wetland plants of northeastern United States, second edition. Univ. of Wisc. Press, Madison, WI, USA. Google Scholar
Haynes, Holm-Nielsen, & Les. 1998. In Kubitzki, K., ed. 1998b. The families and genera of vascular plants. IV. Flowering plants – Monocotyledons – Alismatanae and Commelinanae (except Gramineae). Springer, Berlin. 511 pp. Google Scholar
Haynes, R.R. 1978. The Potamogetonaceae in the southeastern United States. J. Arnold Arb. 59: 170-191. Google Scholar
Haynes, R.R. 2000d. Ruppiaceae. In Flora of North America Editorial Committee. 2000. Flora of North America north of Mexico. Volume 22, Magnoliophyta: Alismatidae, Arecidae, Commelinidae (in part), and Zingiberidae. Oxford Univ. Press, New York, NY. 352 pp. Google Scholar