Dragoneye's rose is tied with Cactus as the least utilized flower in the Herblore skill. It is a required ingredient in only 1 potion. It is used to craft Fire resistance potions and gives 60 XP when harvested.
Dragoneye's rose can be found in level 34 Wilderness, north of the Wilderness Volcano and on Crandor. The best place to gather this flower is Crandor if you have 85 Magic for Crandor teleports.