White, tinged with green, or yellow.
Maine southward to Florida and westward.
Flowers: small; axillary; perfect; growing in loose panicles. Fruit: clustered; a small whitish berry. Leaves; divided into three ovate leaflets; serrated; sometimes downy underneath. Stem: climbing by means of rootlets.
It is no mark of genius to avoid poison ivy after one has had a bad case of poisoning; but it is a wise precaution to acquaint oneself with the plant and then to be content to admire it from a distance. Like many poisonous plants it is not equally injurious to all persons or forms of life. The goat, the mule and the horse have an especial fondness for eating it; and its seeds are distributed through the agency of crows and wood, peckers that relish them keenly. It is thought to be the least harmful when the full blaze of the sun is shining on the leaves.
In almost any kind of soil it will thrive, and it has some appreciation of decorative effects. It covers old stone walls, clumps of trees, traverses the open meadows, and finds its way to the roadside banks. Jack Frost is its greatest enemy, and the first cool days of autumn change its green leaves to many tints of yellow and crimson.
R. Toxicodendron is peculiar to the Southern states. Its lobed leaflets are very pubescent.