Will planting a flower of a tree produce another tree?

Not likely. Some trees species, such as cottonwoods, willows, and aspens, will grow if a section of new spring growth on a branch is removed and placed in soil. The branch piece will grow roots and grow into a tree. Cottonwoods are known to reproduce this way when ice chunks in the river break off parts of the branches and the pieces take hold and grow farther downstream.