Where to find bitter leaves in Fire Emblem Fortune's Weave

As you look for bitter leaves in Fire Emblem: Fortune's Weave, you will find yourself traveling to the four corners of the game's map. Even though this is not a rare material, there are only a few locations where you can find it. Taking the time to visit at least one of these is worthwhile since you need this material to complete one of Leda's perform quests, the "Popular Drink Recipes."