A gardener in Michigan had worked 15 years to eradicate poisonous plants causing allergic reactions. They found a ground-rooting vine with symmetrical clumps of five leaves, leaf shape/color like poison ivy, but five leaflets.
The vine is Virginia creeper (Parthenocissus quinquefolia). It resembles poison ivy but has five toothed leaflets arranged like fingers. Each leaflet often has a red stem. Sometimes the same vine has clumps of three. Poison ivy climbs with hairy brown rootlets; Virginia creeper uses tendrils with tiny suction cups. Virginia creeper lacks poison ivy oils but many are sensitive and get burning/itching rash from sap. It has attractive fall color, less likely to choke bushes. If causing rash, remove it. Pull with gloves/long sleeves; it re-sprouts from roots but not aggressively. Remove before fall fruiting (birds eat fruit and reseed). Roundup works in fall before leaf change. For rash: wear protective clothing, wash exposed skin with soapy water after; Technu or alcohol cleansers may help. Antihistamine/steroid creams, oatmeal soaks, calamine, Aveeno, Aquaphor for existing rash. Seek doctor for generalized swelling.
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