In this case the plant produces sticky substances in glands , commonly at the tips of trichomes . The glands also produce digestive enzymes . When a small enough insect comes into contact with the glands it is stuck in a glue-like substance, and the more it struggles, the more it becomes entrapped. The common sundew plants represent this syndrome. Thigmotropic Traps .
Thigmotropic traps are alarmingly similar to human-made animal traps.
They snare the insects when the insect inadvertently touches a responsive structure. The response of the trap must be fast enough to snare the insect before it flees. The commonest example to most of us is the Venus' fly-trap . Sadly, while this species is commonly available in stores and is grown by many people, it is extremely rare in the wild, known only from coastal swamps in North Carolina and adjacent Virginia.