- 570:211-215. Chadde, Steve, 2002. A
Great Lakes Wetland Flora, 2nd Edition,
PocketFlora Press, Laurium, Michigan, pp 229 and 231. Comb Water-****oil, Myriophyllum...
- 1972–2017 (9 volumes) Chadde,
Steve W.. A
Great Lakes Wetland Flora. 2nd ed.
Pocketflora Press, 2002. ISBN 0-9651385-5-0 Strausbaugh, P. D. and E. L. Core. Flora...