Trees leaves
phloem
Oak trees have simples leaves
The leaves are produced as the result of vegetative growth.
Trees that shed their leaves are called deciduous trees.
Deciduous trees lose their leaves in winter.
The leaves of pine trees are needle-like.
hardwood trees lose their leaves
decuios trees loose their leaves in the winter
They are called coniferous trees. Deciduous trees lose their leaves in autumn. Coniferous trees KEEP their leaves in autumn.
The green colour is produced by the Chlorophyll present in the leaves. When the tree 'shuts down' for winter, the Chlorophyll is re-absorbed, revealing the different colouration of the leaves.
Trees that lose their leaves annually are called deciduous trees.