Breaking up the debris of what was living, releasing the precious materials in it, these fungi, and certain bacteria, retrieve the vital elements from what would otherwise be a permanent and cumulative and ultimately disastrous loss. They are part of what we call decay, but they are as much a part of life. They turn over its wheels.... MOUNTAIN VEGETATION A visit to Olympic is not complete without at least one trip into the high country. Aside from the numerous trails that lead up into the mountains, there are two high country areas that may be reached by car. These are Hurricane Ridge and Deer Park. Whether the trip is made on trail or on road, an understanding of the changing pattern of plantlife will make it more enjoyable. The climate at the top of a mountain is unlike that at the base; accordingly, the plants are different. Plant scientists have found that these vegetation differences on a mountain are similar to the changes seen between the equator and the poles. Generally speaking, each 100-foot rise in elevation is equivalent to about a 20-mile distance north. Although the change may be gradual, there are distinguishable belts of vegetation on a mountain. These belts are called life zones and have names that indicate their correspondence to zones between the equator and the poles. Altogether there are four life zones in the Olympic Mountains: Transition, Canadian, Hudsonian, and Arctic-Alpine. The vegetation of the last three is similar to that of regions to the north at lower elevations, as indicated by their names. The Transition zone in the Olympics is the lowest. It is intermediate between southern and northern vegetation. The lowland forests, including the rain forest already described, are in this zone. The next two zones also are forest, but somewhat different. The highest, or fourth, zone is treeless. The boundaries between the forest zones here are not sharp; it is difficult to know exactly where one ends and the next begins. This merging of forest zones in the Olympic Mountains may be due to the equable temperature extending well up the mountain slopes. The Canadian zone should be apparent when an elevation of 2,000 feet is reached. The forest of this zone is somber compared with that of the Transition zone. Although it has many kinds of small shrubs and herbaceous plants, it lacks the striking greenness of the Transition forest. Western white pine and Pacific silver fir have entered it. Western redcedar is absent, while Douglas-fir and western hemlock remain. There are numerous saprophytes on the forest floor—most of them flowering plants such as pinedrops, Indian-pipe, and coralroot. [Illustration: RED ALDER IS THE FIRST TREE TO GROW AT THE EDGE OF THE CHANGING COURSES OF THE RAIN FOREST RIVERS.]