the Arch-Mage’s Quarters in the college of winterhold is packed full of alchemical goodies such as nirnroot, giants toe, a Frost Atronach Staff, glowing mushrooms, various poisons,  lavender, falmer ears, gold, giant lycian, hanging moss and many more bits and bobs for you to collect. while Savos Aren is arch -mage the ingredients and object respawn every 2-3 skyrim days