Add to Lightbox
Virgin stand of Eastern Hemlock (Tsuga canadensis), Ricketts Glen State Park, Pennsylvania, USA. This park contains one of the largest stands of healthy ancient hemlocks, a species that has been devastated elsewhere by the Hemlock Wooly Adelgid.
Gerry Bishop/Visuals Unlimited, Inc.
all images © Visuals Unlimited
Visuals Unlimited, Inc. specializes in, microscopy, healthcare, medical, wildlife, underwater, agriculture, and science stock photography.