(1) And you can get even better protection by avoiding poison ivy all together, as well as its cousins poison sumac and poison oak.(2) The procedure for making true lacquer required the resin secreted by the Rhus vemicifera, a sumac tree that was not indigenous to the West and was unknown in Europe until the beginning of the eighteenth century.(3) It only takes one case of poison ivy, oak or sumac to convince most people to stay away from these skin-irritating plants.(4) If a child touches poison ivy, poison oak or a sumac plant, causing an itchy rash with pin-size clear blisters, give him a thorough bath to remove the oily resin that caused the reaction.(5) Oak trees provide acorns, dogwoods and sumac provide red berries through the fall and winter and serviceberry bears edible berries in late spring or early summer.(6) If the vision is clouded, the result is not what we intend; the apple tree is a poison sumac .(7) She left the road again and ran until she found another sheltered hollow in the trees and sumac , where she lay down and waited.(8) Taking the trails at a healthy pace, I rounded the corner on a crop of autumn red sumac when two deer bounded out of their shelter beside me, tufts of snow flying in their wake.(9) Irritated summer skin is usually caused by clogged sweat ducts, a condition called prickly heat or miliaria, or by exposure to poison ivy, oak or sumac .(10) Among the thousands of species he planted on LaGuardia Place are red and white oak, cedar, elm, birch, sassafras, dogwood, sumac , Virginia creeper and goldenrod.(11) The most common forms included beech-like trees, poplars, willows, cattails, sumac , soapberry, and conifers such as pines, sequoias, and false cypress.(12) In the northeastern foothills, on relatively dry slopes, bur oak dominates above an understory of hop hornbeam, smooth sumac , coralberry, and poison ivy.(13) Commonly encountered shrubs barberry and Oregon graperoot (both Berberis species), sumacs , rose, blackberry, raspberry, myrtle, alders and elders.(14) Other locally common tannin-rich plants include blackberry, raspberry, rose, lady's mantle, agrimony, meadowsweet, and strawberry (all members of the rose family), geraniums, purple loosestrife, and sumacs .(15) In late summer, we cleared the 2-and 3-inch-diameter sumacs that had invaded the old garden.(16) You will remember that we accidentally killed the original tree, a sumach , by suffocating the roots with a mixture of rotting logs and sunflower husks.