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To the Editor:—
A large vine of poison ivy is entwined about a tree surrounded by a ground cover of the same plant (Figure). The vine is darker than the rest of the trees, and it climbs to the full height of the supporting trees. This illustrates the full range of growth which may not be commonly appreciated. This growth is located at Watch Hill, part of the Fire Island National Seashore, off the South Shore of Long Island, NY.
Ruppe JP. Rhus Toxicodendron (Poison Ivy). JAMA. 1968;206(10):2322. doi:10.1001/jama.1968.03150100072034
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