They can be placed directly across from each other. And they can be placed in sets of three or more at one level. Placement of leaves is also the determining factor in the classification known as simple or compound. Leaves vary greatly in their shape. You may want to categorize your tree into one of the following groups, as you begin the identification process.
Broadleaf trees have flowers that develop fruit.
Their seeds are often inside their fruit. Interestingly enough, the Saguaro cactus is classified as a broadleaf tree because of the characteristics of its fruit. Needleleaf trees form their fruit inside a cone. Most palms have no branches, only large bunches of leaves at the top. Some produce dates or coconuts.