If the statute does not involve a suspect or quasi-suspect classification, then rational basis review applies, in which a court must ask whether the statute is rationally-related to a legitimate governmental interest.
Autumn Foliage Color. The Process of Leaf Color Change. Leaves change color during the autumn because the amounts of pigments change as the leaves prepare to fall from the trees. All leaves gradually lose chlorophyll during the growing season, and this loss accelerates before leaf fall.
Photosynthesis, the chemical reaction that allows plants to use sunlight to manufacture food, plays an important role in color change for tree leaves. During seasons of growth, chlorophyll is constantly produced and broken down, leaving a green color on leaves.