Meanwhile, now that I've gone Wiki-searching, this bit about cocobolo and poison ivy being related is bunk; they're not even in the same order, much less family. (However, in answering an old question we had, poison ivy, poison oak, and poison sumac are all the same genus -- toxicodendron. As is the stuff that produces the sap used for making Chinese lacquer, which tells you something about the dedication of the people who made the stuff! Oh, and mango rind has resins that are chemically similar to poison ivy oils, and can occasionally cause similar reactions.)
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Meanwhile, now that I've gone Wiki-searching, this bit about cocobolo and poison ivy being related is bunk; they're not even in the same order, much less family. (However, in answering an old question we had, poison ivy, poison oak, and poison sumac are all the same genus -- toxicodendron. As is the stuff that produces the sap used for making Chinese lacquer, which tells you something about the dedication of the people who made the stuff! Oh, and mango rind has resins that are chemically similar to poison ivy oils, and can occasionally cause similar reactions.)