This is the obvious outward sign of the plant entering a period of dormancy, conserving its energy and thus improving its adaptation to harsh climates. At the end of the growing season, circulation to the leaves is discontinued, causing them to dry up and fall off, often revealing a startling display of colors usually hidden by the green chlorophyll. Buds are also set for the following year's leaf and shoot growth.
- Wile, Dr. Jay L. Exploring Creation With Biology. Apologia Educational Ministries, Inc. 1998