A Living Refrigerator
In this direct color photograph print it will be seen that the stems and leaves are covered with formations which appear to be tiny icicles. The plant is known as the ice plant, and the icicles, in fact, are stored up moisture which it saves up against the heat of the sun. The need for this extra moisture is not apparent where this plant now grows, and it is reasoned, therefore, that the plant has been stranded, at some time or another in its history, in some unusually hot, dry climate.
This image is from: Luther Burbank: his methods and discoveries and their practical application. Volume 1 Chapter 2