bark of tree of heaven

bark of Chinese ash

bark of Chinese catalpa

bark of Chinese redbud

bark of tree peony root

cassia bark tree

root-bark of Chinese silkvine

root-bark of Chinese wolfberry

root-bark of tree peony

distributions of tree-tree distances

fruit of tree of heaven

Amur Cork-tree Bark

bark of Acacia dealbata

bark of Acacia mangium

bark of Acacia mearnsii De Wilde

bark of amur corktree

bark of boxthorn root

bark of Ciinnamomum cassia

bark of elm tree