Values for FSP taken from Kollman and Côté

Conifers

Heartwood Indistinct

• fir and spruce
  • sapwood and heartwood 30-34%

• pine, white pine, and larch
  • sapwood 30-34%
• pine, larch, and Douglas fir
  • heartwood 26-30%
• other species (high resin content)
  • heartwood 22-24%

Broad Leaved

Heartwood Indistinct

• lime-tree, willow, popular, alder,  birch, beech, and hornbeam
  • sapwood and heartwood 32-35%

• black locust, chestnut, oak,   black walnut, and cherry (ring-porus and semi-ring-porus species)
  • sapwood 32-35%
  • heartwood 22-24%

* "Principles of Wood Science and Technology," Franz F. P. Kollmann and Wilfred A. Côté, Jr., (Berlin - Heidelberg: Springer-Verlag, 1968), pp.199-200.