, called "Virginia Snakeroot", I imagine for the zig-zag pattern of the foliage. This is an herb-like plant, not a vine, like most other members of the genus. This is the only native Aristolochia
in my immediate area, and is the only hostplant, apparently, for the local Pipevine Swallowtails. This is a documentary shot for the Encylopedia of Life--am making no great claims to artistic merit on this one--it does show the zig-zag stem. There is a rather chilling story about the poisonous properties of this genus--Manna from Hell
--from The Scientist
. It is still used as an herbal supplement. All species of this genus apparently contain the potent nephrotoxin (kidney toxin) Aristolochic acid
. This is the stuff that protects the Pipevine Swallowtails from predation!