The tongue is just the mouth cut out, turned 90 degrees and reattached. The mouth was built up using tinfoil that was rolled into a snake and taped on. Then it was all mached together.

I cut some thin corrugated cardboard in the shape of the leaf and paper mached it into place. Then I added some veins using pasted paper towels that i laid down to add dimension. Wait for everything to dry and paint in whatever colors you wish, For this plant i used greens and burnt siennas for the body of the plant and some burgandy and black for the mouth region. To finish this man eater I added in a small skull, some some glue gun teeth and drool. Seal with an outdoor sealer and your ready to add it to your Halloween display. I kept his mouth open so that if i wanted to add lighting I could, or if I find I need to weigh it down i'll just add some sand.
