Hi Pete-
If you really want to keel over from a putrid, rotten, stench....try: Amorphophallus konjac..."Devil's Tongue" / "Corpse Flower"... Just one sniff will do it! I sends up a beautiful, exotic-looking rack of leaves, and the tubers/corms can grow to enormous proportions. I grew this "flower" in my earlier teen days, from a corm the size of a small melon. After dormancy, I stored the bulb in my bedroom. Well, around Jan-Feb. it sent up a fat, spotted stalk, and then a gigantic red-purple flower - that looked like a hideous Calla-Lily from Hell. - developed on top of a 4 ft. long stem. After a few days, as the flower matured, it unfurled to reveal a livid, blotchy, spotted coloration. Then the infamous smell commenced the assault. Faintly at first, then, a full blast of a stink, similar to putrid, meat/cabbage/fish permeated every crevice of my house. My mom, and dad, told me that either the flower, or, I, have to go. I gave away the bulb with all due speed, and then endeavored to find other ways to vex my parents, it seems.
Try one of these plants to prove to all your friends that you have a demonic, 'Little Shop of Horrors', sense-of-humor. Makes for great conversation when throwing a few back. Really easy to grow too.
Frank
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EDIT: If anyone growing this plant has a few extra corms, please let me know. I'd like to purchase. fdvpiano@yahoo.com