Recent research on the venus flytrap Dionaea muscipula suggests that it counts the number of times the trigger hairs are tripped after the trap shuts, and determines what to do based on the results: two stimulations results in an increase of hormone, while five triggers the release of digestive enzymes. If the trigger hairs are not stimulated, the trap reopens.
http://www.cell.com/current-biology/abstract/S0960-9822(15)01501-8

(It’s an open access article.)

Interesting. I wonder what the mechanism is

OK! Time to remake The Goonies so this can be included in the dangerous creature protocol scene. Just tack a comment or two onto the lie still for bear attack reference. Sweet.

See also popular article based on same research.
Venus flytrap plants can ‘count’ to five

They must have a sophisticated nervous system. So where is it?

mollwollfumble said:

See also popular article based on same research.
Venus flytrap plants can ‘count’ to five

They must have a sophisticated nervous system. So where is it?

Chemical.