These ridges of blisters are characteristic of both poison ivy and poison oak rashes, and are a sure sign that you've wandered through a patch of the toxic plants. Contrary to popular belief, breaking the blisters will not spread the dermatitis. Both species produce a deceptively attractive lush green growth.
PHOTO: SANDRA DARK
Poison oak is a shrubby ground plant that favors shaded woodland areas.
Poison ivy vines tend to climb trees or other upright supports.
Learn to recognize the plants by their alternate leaves with three leaflets per frond and you won't mistake the inoffensive five-leaved Virginia creeper vine for its dangerous neighbors