Wyassup, North Stonington
Wyassup Map

(300KB, .pdf format*)

Transect Data (184KB, .pdf format*) | Water data


   Wyassup Lake is a 99 acre lake that is located in North Stonington, CT. The western side of the lake is bordered by the Pachaug State Forest. There is some residential development around the lake and a road around almost the entire lake. Public boat access is permitted and there is a DEEP boat launch on the southwestern shore. There are four islands in the middle-east portion of the lake. It is particularly rocky and shallow around the two smaller adjacent islands.

   The CAES IAPP 2013 survey of Wyassup Lake found 18 species of aquatic plants. One species is invasive,Myriophyllum heterophyllum(Variable watermilfoil). It was found growing mostly in the middle of coves around the lake. The most commonly found plant in the lake was a native calledNajas guadalupensis (Southern water nymph). This plant was found growing everywhere in the lake where the depth was 1.2 to 2.5 meters. N. guadalupensis was present on 34 of the 100 transect points. It grew in dense mats across the bottom of the lake bed, never reaching the surface. Native plants dominated the shoreline as well, including:Eleocharis species(spikerush), Elatine species (waterwort) andLudwigia species(water primrose). Both these plants were found growing along most of the shoreline, including the island shoreline. There were sporadic spots where they would not grow, commonly where it was very rocky along the shore. Floating leaf plants were found mostly in the coves (Nymphaea odorata– white water lily andNuphar variegata– yellow water lily). Three bladderwort species were found growing in low abundance in various places around the lake (Utricularia gibba, Utricularia macrorhiza,andUtricularia purpurea).

Find Common Plant Names

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Species recorded in our 2013 survey of Wyassup Lake. Click on plant to view herbarium mount. (invasive species in bold)
Najas flexilis
Potamogeton pusillus

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