Well that certainly is an interesting flower. ^^

Snapdragon! It actually looks adorable before it bites him, like its got its mouth open asking for water.

I'm doing a dragon tf with a plant trigger as well, though mine is *cough* a bit more adult. A flower bud made of vine wrapped together, which, when approached, open, revealing a flower with the vine tips whipping about inside, which are actually the plant's pistol and stamen. They themselves wrap together into a shape that is more than a little phallic in appearance. Course, while the victim is watching that bizarre show, the vines on the floor are quietly tangling him/her up, without them noticing...