American pecan and hickory are different species of a very diverse group, but in the round (log) they are virtually indistinguishable from each other and therefore often processed by saw mills and sold mixed together.
Carya spp.
May be referred to as pecan hickory
Pecan trees grow naturally in the south eastern USA and principally in the Mississippi valley. It is an important fruit-bearing tree and varies in size enormously.
FIA data shows U.S. pecan growing stock is 46.8 million m3, 0.3% of total U.S. hardwood growing stock. American pecan is growing 931,000 m3 per year while the harvest is 355,000 m3 per year. The net volume (after harvest) is increasing 576,000 m3 each year. U.S. pecan growth considerably exceeds harvest in the four main producing states of Arkansas, Kansas, Louisiana, and Mississippi.