Why do plants have a different appearance?

There is a very wide variety of plant species. Plants differ in their habitat, size, shape of leaves, the presence of certain organs and tissues, and so on. Such differences are caused by the evolution of plants. Various species have received adaptations to the environment, some beneficial mutations. This is how many species appeared. Even plants from the same species can differ due to different environmental conditions. Also, the person made a great contribution to this. We are constantly creating new species for our purposes.