I think we want sapwood as well as heartwood to keep us green.
"We Girls: A Home Story"
Mrs. A. D. T. Whitney
Very heavy and long continuing must have been the ice on these to thus permanently crook their red heartwood.
"Old Plymouth Trails"
Winthrop Packard
It is really imperfect wood, while the duramen or heartwood is the perfect wood; the heartwood of the mature tree was the sapwood of its earlier years.
"Seasoning of Wood"
Joseph B. Wagner