Sun berries are an aboveground plant found naturally growing only in good areas. They have a high value, and can be brewed into sunshine, the highest value alcohol in Dwarf Fortress. While high value does not increase the chance of a dwarf having a happy thought, it may increase the effect of such a thought. Caravans that travel to your fortress from good areas may bring stacks of sun berries or bags of seeds for trade; this can allow you to set up a sun berry farm anywhere outdoor crops will grow, as long as you are in an adequate biome. Some dwarves prefer sun berries for their inner light.
[NAME:sun berry][NAME_PLURAL:sun berries][ADJ:sun berry]
[SEED:sun berry seed:sun berry seeds:4:0:1:LOCAL_PLANT_MAT:SEED]