• Angiosperms (hardwoods) produce tension wood
(เนื้อไม้ฝืนแรงดึง), which is usually located on the
upper side of branches or leaning trunks where the
wood is under a tension force.
• Gymnosperms (softwoods) from compression wood
(เนื้อไม้ฝืนแรงกด) on the lower side of branches or
leaning trunks, where the wood is under a
compression force.