I'm partial to pitcher plants. Of the more than 450 pots of carnivorous plants I grow, and out of the 12 genera and more than 700 species of carnivorous plants in nature, nearly all of my cultivated specimens are of a single genus: Sarracenia.

Why? They're big (not that it matters), they're winter hardy without protection where I live (USDA Zone 7B) and they're North American natives. And among these, most of my species clones are Yellow Pitcher Plants (Sarracenia flava) and Purple Pitcher Plants (S. purpurea), the only two native to my adopted state (ok, commonwealth) of Virginia.

My putative favorites, however, are the naturally-occuring hybrids. When it comes to interbreeding, pitcher plants give a middle finger to Mendelian genetics: Sarracenia scoff at the Law of Dominance and treat genetic traits as equals when different species mix. This, plus the continued interbreeding of these fertile hybrids - with each other and with their parent species - create seemingly endless variation.