Some of my favorites include orchids, aroids, jungle cacti, agaves, bananas, amorphophallus, nepenthes, and everything rare, interesting, or unique.
From the en.wikipedia.org
The Basel Botanical Gardens expects 10,000 people to see its amorphophallus titanum, or corpse flower, in full glory before the bloom wilts late Saturday or Sunday.
From the sacbee.com
Amorphophallus titanium, which can grow 6 feet or taller, takes its name from the obnoxious odor of its flower, an odor said to be reminiscent of rotting flesh.
From the stltoday.com
More examples
Any plant of the genus Amorphophallus
Amorphophallus (from Ancient Greek amorphos, "without form, misshapen" + phallos, "penis", referring to the shape of the prominent spadix) is a large genus of some 170 tropical and subtropical tuberous herbaceous plants from the Arum family (Araceae). ...