Black Hall Pond - Old Lyme, CT 


2005 Aquatic Plant Survey Map of Black Hall Pond

(1.4 MB, .pdf format*)

Transect Data (234 KB, .pdf format) | Water Data

         Black Hall Pond is a 12.6-acre body of water.  The western shore is minimally settled and the homes on the eastern shore have little buffer from the water’s edge. The maximum observed depth was 16.1 feet.

         The CAES IAPP 2005 survey found sixteen aquatic plant species. One species, Myriophyllum heterophyllum is invasive. It was found as a small patch in the northern section of the pond.  All of the vegetation was limited to shallow waters along the pond’s edge.

         The dominant species was Elodea nuttallii, which was found through out the shallow areas.  Elodea nuttallii was closely followed in abundance by Nymphaea odorata, which was found closer to the shore.  Brasenia schreberi, Callitriche heterophylla, Ceratophyllum demersum, Charaphyte, Isoëtes tuckermanii, Najas flexilis, Potamogeton amplifolius , Potamogeton epihydrus, Potamogeton pulcher, Utricularia gibba, Utricularia purpurea, Utricularia radiata, Potamogeton gramineus, Potamogeton bicupulatus, unidentified sedge and Nuphar variegata, were found in small to medium patches in shallow parts of the lake.

Find Common Plant Names

(65 KB, .pdf format*)

Species recorded in our 2005 survey of Black Hall Pond. Click on plant to view herbarium mount. (invasive species in bold)

Brasenia schreberi

Callitriche heterophylla

Ceratophyllum demersum

Elodea nuttallii

Isoëtes tuckermanii

Myriophyllum heterophyllum

Najas flexilis

Nuphar variegata

Nymphaea odorata

Potamogeton bicupulatus

Potamogeton epihydrus

Potamogeton gramineus

Potamogeton pulcher

Utricularia gibba

Utricularia purpurea

Utricularia radiata

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