Heartwood dark red, sapwood pale yellow. Tamarind timber consists of hard, dark red heartwood and softer, yellowish sapwood. The sapwood is pale brown, the heartwood light brown. The wood is bicolor, with salmon pink heartwood and yellowish white sapwood. The pale yellow sapwood is sharply demarcated from the heartwood. This gives wood with almost only sapwood and no heartwood. The trunk consists of five main parts&colon; the bark, inner bark, cambium, sapwood, and heartwood. It has the unusual property of having less dense heartwood than sapwood. The fiber length of sapwood is generally longer than the fiber length of heartwood. This is why sapwood generally dries faster than heartwood under the same drying conditions. Only the heartwood and sapwood are useful for making pulp. This may or may not correspond to heartwood and sapwood. The heartwood is light to medium reddish brown. Tyloses are outgrowths on parenchyma cells of xylem vessels of secondary heartwood. Black walnut is highly prized for its dark-colored, straight grained, true heartwood.