Buddha's hand (Citrus medica var. sarcodactylis) is a striking variety of citron whose fruit splits into long, finger-like yellow segments that splay out like a clutch of knobbly fingers. Almost entirely fragrant rind and pith with little or no pulp and no juice, it is grown chiefly for its powerful violet-and-lemon perfume — zested over dishes, candied, infused into spirits and set out whole to scent a room.