The vertical organization of woodland structure
is commonly classified in terms of characteristic layers.
In Hong Kong, woodland shows a considerable similarity
to the humid subtropical forests, which are generally divided into four layers.
a) Emergent layer
b) Closed tree canopy layer
c) Tree-shrub layer
d) Sparse ground layer
In addition, tropical and subtropical woodlands and forests typically
are filled with lianas
in tropical forests) and epiphytes
(plants growing on aerial parts of other plants).