Crocus

Crocus (クロッカス, Kurokkasu) is Laboon's caretaker and the overseer of the Lighthouse that guides ships coming down from Reverse Mountain into the Grand Line. Though he was a lighthouse keeper for most of his life, he spent three years as a doctor serving as a part of Gol D. Roger's crew.

Source: http://onepiece.wikia.com/wiki/Crocus