Cambium - a soft layer of tissue between the wood and bark in woody plants, from which the cells of new wood and bark are developed.
Deciduous - falling off at a certain season or stage of growth, as the leaves of some trees
Diameter - straight line passing through the center of the trunk
Fertilize - to bring a male germ cell to a germ to a female egg cell so that a new plant or animal can develop.
Embryonic - relation to an organism in the early development stage.
Extinct - no longer in existence.
Root Fungi -spore producing organisms that attack the roots of trees.
Temperate - degree of heat or coldness in the air.