When fallen leaves are blown by the wind, they often come to rest in and around the branches of soon-to-be-dormant plants.
In the frenzy of fall cleanup, many people gather these clumps of leaves, filling bags to be dealt with by their towns. Yard waste, I believe they call it. It is, in fact, a waste to bag up perfectly good leaves. Allowing them to accumulate in wind-swept mounds provides warmth for the plants in the winter and nutrients for the soil as the leaves decompose. It may not look as orderly to our eyes, but nature has its own order, in which nothing goes to waste.