poison ivy markweed poison mercury poison oak Toxicodendron radicans Rhus radicans
poison_ivy%1:20:00:: markweed%1:20:00:: poison_mercury%1:20:00:: poison_oak%1:20:02:: toxicodendron_radicans%1:20:00:: rhus_radicans%1:20:00::
climbing plant common in eastern and central United States with ternate leaves and greenish flowers followed by white berries; yields an irritating oil that causes a rash on contact