Table 1.
Yeonggeon-Uigwe National Wood Species by Century

Species/Century	17th	18th	19th	20th
Pinus densiflora	○	○	○	○
Pinus koraiensis			○
Juglans mandshurica	○	○	○
Zelkova serrata				○
Faxinus rhynchophylla	○		○
Betula schmidtii		○
Paulwonia coreana		○
Quercus spp.	○	○	○	○