Well, the century plant catches mice, bats, squirrels, any small mammals. Uses a sweet syrup as bait, then holds on to its catch and feeds on it.
12 seconds sound clip from the The Thing from Another World movie soundboard.
You can hear this line at 00:46:57 in the Blu-ray version of the movie.
Quote context
[...]
- Not for long, not if they happen to know anything about the flora of their own planet.
- You mean there are vegetables right here on earth that can... think?
- A certain kind of thinking, yes.
- You ever hear of a telegraph vine?
- Or the... Is it the Acanthus Century plant, Dr. Stern?
- Yes.
- Go ahead, doctor. That's your field.
- And what's the telegraph vine?
- Look here, I took this from under the soft tissue of the palm of the hand.
- Our superior. Our superior in every way.
[...]