This plant I started from seed that I got from Phill Mann in Australia.
Out of the hundreds of seedlings that I started a few years ago only a few have shown this funny hook in the side ribs on the pitcher. As the plant grows, it seems to show better with each new pitcher. I do have another plant that I got from Charles Brewer that also does this. He calls it his double rib clone. This plant also doesn't show this funny hook until you get more adult pitchers. After taking these pics I transfered it to my 20 gal long tank. We will see how it does as it gets older.