Lilly of Glenden Wood tells you, "I use Auroch horns in the making of my potions. I discovered how to use Mattekar horns to produce health elixirs and Sunflowers to make Sunflower oil."
Lilly of Glenden Wood tells you, "If you give me a horn, I'll give you some of my potion in return. If you give me a Sunflower I'll give you some Sunflower oil."