Other trees have only male or female parts on any one tree. All flower parts in buds are at some stage of development. Some are completely formed and just need water to pump them up. Others have tissues that need to develop before they can be expanded. For spring-blooming trees, cutting into a flower bud shows miniature tissues crumpled and wrapped around each other, waiting for the proper signal to grow.
Some trees have flowers that begin to form colors in the bud.
Others wait for bud expansion to generate colors. Still other buds contain tissues that will remain green or brown and blow in the wind. If you think only the flower buds contain a tree's genetic future, think again. Leaves, too As spring temperatures and soil water supplies begin to rise, the leaf buds begin to swell. The leaves inside the buds uncurl and fill out.