Please take a look at the information provided before posting. It is used in two quests, and they are outlined above. It is also used in a tradeskill recipe, but i don't have the proper account to view which one it is.
NPC vendors will buy this off of players, so it's possible that it might be found on vendors in Twilight or Katta. (Offer price was only 2 silver, so most probably end up as little druid droppings.)
So far with a skill of 130 foraging, I've spent about 5-6 hours attempting to forage one in Twilight Sea (got 26 feathers though). However, I was trying to forage while hiding in one of the back rooms of the castle.
This flower can be found in bazaar on vendors, as well as gfay, and a few other common zones. If you're a non-forager like me (wizard) this fact is kind of handy to know.
I too foraged one in the Twilight Sea. Was using my Druid, with a forage skill in the low 70's. Took about 45 minutes. Did it while working on my fishing skill (gotta do it sometime).