United States, Wisconsin, Barron, Beaver Dam Lake
T36N R14W sec35
Mucky bottom in 1m of water. Common assoc.: (Nitella sp.) nitella, (Najas flexilis) bushy pondweed, (Potamogeton gramineus) variable pondweed.
A single location was found. The plants were extremely dense and dominated the bottom at the location. Doesn't look like anything we've ever seen. Submerged form of a normally terrestrial spikerush?