Coefficient of Conservatism:
10
Coefficient of Wetness:
-5
Wetness Index:
OBL
Physiognomy:
Nt P-Forb
G. E. Crow
habit
Local in bogs and interdunal boggy pools, lakes, and streams.
A more delicate species in every way than P. natans. The stems of P. oakesianus (at least when dry) are 0.4–0.9 mm thick, while those of P. natans are usually 1 mm or more (0.7–2.5 mm). The submersed leaves and petioles of the floating leaves of P. oakesianus are likewise more delicate on the average than those of P. natans. The petioles in P. oakesianus seem rarely if ever to develop the distinct whitish band at the summit usually characteristic of P. natans.
Locations
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Alger County
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Allegan County
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Baraga County
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Benzie County
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Cass County
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Charlevoix County
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Only on Beaver Island
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Cheboygan County
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Chippewa County
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Delta County
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Gogebic County
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Hillsdale County
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Iron County
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Kalamazoo County
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Kent County
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Leelanau County
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Luce County
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Mackinac County
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Marquette County
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Newaygo County
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Ogemaw County
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Osceola County
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Presque Isle County
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Schoolcraft County
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Citation:
MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. January 15, 2019. https://michiganflora.net/species.aspx?id=2332.