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Heart sapwood distinction was not obvious , chestnut brown .

心边材区别不明显，材色栗褐色。

The older , inactive central wood of a tree or woody plant , usually darker and harder than the younger sapwood .

心材，树干树木或木本植物中较老的不再生长的部分，通常比树龄短的边材更硬且颜色更深。

The sapwood is pinkish and the heartwood pinkish-brown . Texture is uniform and occasional pieces have highly figured , wavy grain .

边材为粉红色，心材为粉红褐色。质地统一，个别木材有图案明显的波状纹路。

The greatest variation takes place in the volume contractive rate of the heartwood , collapse factor and collapse depth of the sapwood .

心材的体积收缩率、边交界材的皱缩因子和皱缩深度变化最大。