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Poison Sumac <br /> � r <br /> w � <br /> i Y S R <br /> F � <br /> Poison Sumac is a small tree or large shrub with large attractive leaves and white fruit that could be <br /> used as an ornamental if it didn't cause severe skin irritation in most people. Its smaller relatives <br /> with 3-parted leaves, Poison Ivy and Poison Oak, have similar irritating properties. <br /> Key features to identify it include are alternate leaves usually with 9-13 entire (not toothed) leaflets <br /> and a red rachis (the stem connecting the leaflets). The leaflets are smooth and may be shiny <br /> above. <br />