Interesting looking plants, I don't know that I'd go so far as to call them ugly.

From the article:

4 Corpse flower (Amorphophallus titanium)

This plant only blooms every four to six years within its 40-year life expectancy. The flower is described as the world's largest; reaching 5ft high and 4ft wide. For eight hours of the three-day bloom, the flower emits a smell that is described as rotting flesh, attracting a carrion-eating beetle, for pollination. The plant is also known as an aphrodisiac.

I hate to picture who that would include

I agree. Beauty is in the eye of the beholder. The aristolochia, which I like to grow as food for caterpillars, is beautiful. And plants with a caudex, such as pachypodium and adenium, are some of my favorites. There are far more interesting qualities to each of those plants than their "ugliness". That list is lame.