Minecraft wiki entry for Dark_oak, associated text: Apple (chance of dropping when breaking leaves)
Dark Oak Leaves (harvested with shears)
Dark Oak Log (harvested with any tool including hands)
Dark Oak Planks (created from a log in the inventory crafting grid)
Dark Oak Sapling (chance of dropping when breaking leaves)
Stripped Dark Oak Log (created by using an axe on a log)
Vines‌[Bedrock Edition only] (harvested with shears from a dying tree)
Stick (chance of dropping when breaking leaves)