🚀 go-pugleaf

When I was in school, there were only five known plant hormones.  I can only
remember four:  1) florigen, which had been shown to exist through
experiment, 2) kinetin, which also was only known through its effect, but
was believed to consist of RNA fragments, 3) auxin, which was known through
experiment and through discovery of synthetic auxins, and 4) FRH (fruit
ripening hormone) which was the only hormone whose chemical structure was
known (it is the 6-atom molecule ethylene).

Can someone update me on plant hormones?  How many are known to exist?
If the list is short, please describe their name, chemical structure,
and effects.