Tags: Garden.
The Stony Brook Millstone Watershed Arboretum is an arboretum maintained by the nonprofit Stony Brook Millstone Watershed Association and located at 31 Titus Mill Road Pennington in Mercer County New Jersey. It is open daily without charge.The arboretum is located within the association’s 860-acre (3.5 km2) nature reserve. Its tree collection includes Acer japonicum (Japanese maple) Acer saccharinum (silver maple) Carya spp.