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Williams Brook, Winchester
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   Williams Brook is a 5-acre pond located within a municipal park, although the beach was closed to swimming during 2005. The town is installing aerators in the pond and making other improvements to the park and plans to reopen it during 2006.

   A total of 10 species of aquatic plant were recorded in Williams Brook  during our September 2005 survey. The most abundant of these were the floating-leaved water lilies, Nuphar variegata and Nymphaea odorata. These species occurred in large and small patches around much of the pond and were absent only from the pond’s southeast shore. A particularly large patch of Nymphaea and Nuphar plants was recorded on the northern shore, east of a municipal swimming area.

   Several other floating-leaved species also were recorded in the pond, including watershield (Brasenia schreberi) and spotted pondweed (Potamogeton pulcher), which occurred in small patches along the western and southern shores. Ribbonleaf pondweed (Potamogeton epihydrus) was recorded in these locations as well but was less abundant, and snailseed pondweed (P. bicupulatus) was observed in several areas near the northern and southern shores. Submerged plants of pickerelweed (Pontederia cordata ) were observed near the shore in the southeast part of the pond, and bushy pondweed (Najas flexilis) and spikerush (Eleocharis acicularis) grew in one area near the northern shore.

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

Brasenia schreberi

Eleocharis acicularis

Lemna minor

Najas flexilis

Nuphar variegata

Nymphaea odorata

Pontederia cordata

Potamogeton bicupulatus

Potamogeton epihydrus

Potamogeton pulcher


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