The Black mangrove has narrow, egg-shaped shaped leaves with pointy ends. Although Image of Black Mangrove leavesthe leaves are dark green, they are often whitish. This is the salt that the tree pushes out its system. All living things on our planet need fresh water to survive. Mangrove trees have adapted to their salty environment by being able to turn salt water into fresh water and pushing out the salt through the pores in their leaves.