The tulip will cure the big-head kid of his condition and he will give you the other half of the map (to the bandit gang's hideout). Combine this with the half found at the bank (after you foil the train robbery), and you can ride to capture the gang there.
he is back to normal
you give it to the boy at diamond plains to cure him
in the wild west
it is in nabooti island
The blue tulip is for the guy w/ the large head.
look up poptropica wild west cheats ;)
go up the sleep
Dos Cactos
Coming out of the mine at Rocky Ridge.
You get it from the boy with the big head once you give him the blue tulip once you get it, it appears on your map.
the tulip is for that fat head boy in dos cactos in poptropica wild west
give it to the big headed kid in Dos Cactos