Grey Birch Tree Betula populifolia. Fall color is an undistinguished yellow. Pin By A Guide To Northeastern Garden On Tree Identification Tree Leaf Identification Tree Identification Leaf Identification The flowers appear from April to May. Birch tree leaves identification . The leaves have a petiole or leaf stalk. River Birch Tree Betula nigra. However to tell the trees apart look at the bark and leaves. Silver birch is monoecious meaning both male and female flowers catkins are found on the same tree from April to May. Downy Birch Tree Betula pubescens. Birch wood is often used for fire wood because it burns well without popping even when frozen. Birch species are generally small to medium-size trees or shrubs mostly of temperate climates. Birch tree leaves may be toothed or pointed. The needles and scales of conifers are also considered types of leaves. The simple leaves are alternate singly or doubly serrate feather-veined petiolate and stipulate. Gra...