it may be an item that looks like a bow and is really for another class or it could possibly just be a glitch, luckily the green bow doesn't sound that powerful so you will find an upgrade quite soon :D
@badboy3022 you can only use certain weapons for certain classes so if you have not unlocked the thrower you can not use the flower pots after completing missions you unlock classes
@zoo518 he has quite a bit that is why you should use poison it stacks to about 5k damage and the thrower pumpkins worked well, plus an archer with a bow having the stop effect makes u invincible