Willow Oak Leaves
I like the colors of fall, and that generally inclucdes the less showy colors of the brown leaves collecting in corners of the yard or against the curb in a parking lot. There are willow oaks (Quercus phellos) planted in the parking lot at work and their leaves are starting to fall in significant numbers. The leaves on healty specimens turn a lovely yellow but because of their constraints on their roots, these trees are not particularly healthy and their leaves mostly turn a simple brown as they fall, somewhat prematurely, to the ground.