Fig. 4From: The “chi-chi” of Ginkgo biloba L. grows downward with horizontally curving tracheids having compression-wood-like featuresThe sample D cutting diagram for thioacidolysis analyses. a Cut boards from 1 to 17. The board No. 1 is the uppermost part, and the board No. 17 is the lowest part. The ruler unit is cm. b The schematically illustrated locations for the thioacidolysis samples of Da, Db, Dc, Dd, De, Df, Dg, Dh, Di, Dj, Dk, and DlBack to article page