Acer is about a tree. The sappy secret life of the maple tree, pulsing and flowing. And the fine grained, well behaved wood of the tree, that sometimes gets as wild as a tiger.
Each year the maple sap rises, but not as a simple flow. It is a complicated dance, tree and temperature, soil and air, water and nutrients. Sometimes moving up the tree, then settling back down, sometimes pushing strongly and other times freezing, entering a period of stasis.