When certain plants are brought into proximity or actual contact with the skin of certain individuals, more or less reaction follows. The skins of some persons, however, are not appreciably inflamed even from contact with the most commonly known poisonous plants.
No writer on this subject, so far as I know, has yet attempted to enumerate or classify all such poisonous plants. Some authors do not mention more than a few of the well known plants, such as the poison ivy, the sumac, the wild rose, and the nettle, with their several offending members.
Various other names are continually being added to the list of so-called poisonous plants, namely, plants that are capable of producing a dermatitis venenata on the susceptible skin of certain persons.
A plant that is capable of producing a dermatitis in certain sensitized individuals appears to be less infectious at certain seasons of the