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Pinner wrote: These pictures and their accompanying text are taken from a beautiful old book on tree identification written by R. ST. Barbe Baker, the self-styled founder of the wonderfully-named The Men of the Trees, an organization I know nothing about, but wish I had belonged to. The book came out in the 1940's, so all of it is now copyright free.
Weed Identification Guide Poison Ivy Type: Broadleaf perennial Size: To 15 feet tall and wide Where it grows: Sunny or shady landscape or garden areas Appearance: Vine, shrub, or groundcover with leaves divided into three leaflets; clusters of green berries. Control: Prevent it with a deep layer of mulch. If it starts to grow in your yard, spot-treat it with an herbicide.