The Dwarf Pine, or White-Bark Pine (Pinus albicaulis), forms the extreme edge of the timberline throughout nearly the whole extent of the Range on both flanks. It is first met growing with the two-leaved pine on the upper margin of the alpine belt, as an erect tree from fifteen to thirty feet high and from one to two feet in diameter hence it goes straggling up the flanks of the summit peaks, upon moraines or crumbling ledges, wherever it can get a foothold, to an elevation of from 10,000 to 12,000 feet, where it dwarfs to a mass of crumpled branches, covered with slender shoots, each tipped with a short, close-packed, leaf tassel. The bark is smooth and purplish, in some places almost white. The flowers are bright scarlet and rose-purple, giving a very flowery appearance little looked for in such a tree. The cones are about three inches long, an inch and a half in diameter, grow in rigid clusters, and are dark chocolate in color while young, and bear beautiful pearly-white seeds about the size of peas, most of which are eaten by chipmunks and the Clarkeβs crows. Pines are commonly regarded as sky-loving trees that must necessarily aspire or die. This species forms a marked exception, crouching and creeping in compliance with the most rigorous demands of climate; yet enduring bravely to a more advanced age than many of its lofty relatives in the sun-lands far below it. Seen from a distance it would never be taken for a tree of any kind. For example, on Cathedral Peak there is a scattered growth of this pine, creeping like mosses over the roof, nowhere giving hint of an ascending axis. While, approached quite near, it still appears matty and heathy, and one experiences no difficulty in walking over the top of it, yet it is seldom absolutely prostrate, usually attaining a height of three or four feet with a main trunk, and with branches outspread above it, as if in ascending they had been checked by a ceiling against which they had been compelled to spread horizontally. The winter snow is a sort of ceiling, lasting half the year; while the pressed surface is made yet smoother by violent winds armed with cutting sand-grains that bear down any shoot which offers to rise much above the general level, and that carve the dead trunks and branches in beautiful patterns.
During stormy nights I have often camped snugly beneath the interlacing arches of this little pine. The needles, which have accumulated for centuries, make fine beds, a fact well known to other mountaineers, such as deer and wild sheep, who paw out oval hollows and lie beneath the larger trees in safe and comfortable concealment. This lowly dwarf reaches a far greater age than would be guessed. A specimen that I examined, growing at an elevation of 10,700 feet, yet looked as though it might be plucked up by the roots, for it was only three and a half inches in diameter and its topmost tassel reached hardly three feet above the ground. Cutting it half through and counting the annual rings with the aid of a lens, I found its age to be no less than 255 years. Another specimen about the same height, with a trunk six inches in diameter, I found to be 426 years old, forty years ago; and one of its supple branchlets hardly an eighth of an inch in diameter inside the bark, was seventy-five years old, and so filled with oily balsam and seasoned by storms that I tied it in knots like a whip-cord.
In going across the Range from the Tuolumne River Soda Springs to Mono Lake one makes the acquaintance of the curious little Nut Pine (Pinus monophylla). It dots the eastern flank of the Sierra to which it is mostly restricted in grayish bush-like patches, from the margin of the sage-plains to an elevation of from 7000 to 8000 feet. A more contented, fruitful and unaspiring conifer could not be conceived. All the species we have been sketching make departures more or less distant from the typical spire form, but none goes so far as this. Without any apparent cause it keeps near the ground, throwing out crooked, divergent branches like an orchard apple-tree, and seldom pushes a single shoot higher than fifteen or twenty feet above the ground.
The average thickness of the trunk is, perhaps, about ten or twelve inches. The leaves are mostly undivided, like round awls, instead of being separated, like those of other pines, into twos and threes and fives. The cones are green while growing, and are usually found over all the tree, forming quite a marked feature as seen against the bluish-gray foliage. They are quite small, only about two inches in length, and seem to have but little space for seeds; but when we come to open them, we find that about half the entire bulk of the cone is made up of sweet, nutritious nuts, nearly as large as hazel-nuts. This is undoubtedly the most important food-tree on the Sierra, and furnishes the Mona, Carson, and Walker River Indians with more and better nuts than all the other species taken together. It is the Indianβs own tree, and many a white man have they killed for cutting it down. Being so low, the cones are readily beaten off with poles, and the nuts procured by roasting them until the scales open. In bountiful seasons a single Indian may gather thirty or forty bushels.