John Muir: Wilderness Essays, Environmental Studies, Memoirs & Letters (Illustrated Edition). John Muir
Читать онлайн книгу.
and the ranges of the Great Basin, where in many places it grows to a good size, and is an important timber tree where none better is to be found. In the park it is sparsely scattered along the eastern flank of the range from Mono Pass southward, above the nut-pine, at an elevation of from eight to ten thousand feet, dwarfing to a tangled bush near the timber-line, but under favorable conditions attaining a height of forty or fifty feet, with a diameter of three to five. The long branches show a tendency to sweep out in bold curves, like those of the mountain and sugar pines to which it is closely related. The needles are in clusters of five, closely packed on the ends of the branchlets. The cones are about five inches long,--the smaller ones nearly oval, the larger cylindrical. But the most interesting feature of the tree is its bloom, the vivid red pistillate flowers glowing among the leaves like coals of fire.
The dwarfed pine or white-barked pine (Pinus albicaulis) is sure to interest every observer on account of its curious low matted habit, and the great height on the snowy mountains at which it bravely grows. It forms the extreme edge of the timber-line on both flanks of the summit mountains-if so lowly a tree can be called timber-at an elevation of ten to twelve thousand feet above the level of the sea. Where it is first met on the lower limit of its range it may be thirty or forty feet high, but farther up the rocky wind-swept slopes, where the snow lies deep and heavy for six months of the year, it makes shaggy clumps and beds, crinkled and pressed flat, over which you can easily walk. Nevertheless in this crushed, down-pressed, felted condition it clings hardily to life, puts forth fresh leaves every spring on the ends of its tasseled branchlets, blooms bravely in the lashing blasts with abundance of gay red and purple flowers, matures its seeds in the short summers, and often outlives the favored giants of the sun lands far below. One of the trees that I examined was only about three feet high, with a stem six inches in diameter at the ground, and branches that spread out horizontally as if they had grown up against a ceiling; yet it was four hundred and twenty-six years old, and one of its supple branchlets, about an eighth of an inch in diameter inside the bark, was seventy-five years old, and so tough that I tied it into knots. At the age of this dwarf many of the sugar and yellow pines and sequoias are seven feet in diameter and over two hundred feet high.
In detached clumps never touched by fire the fallen needles of centuries of growth make fine elastic mattresses for the weary mountaineer, while the tasseled branchlets spread a roof over him, and the dead roots, half resin, usually found in abundance, make capital camp-fires, unquenchable in thickest storms of rain or snow. Seen from a distance the belts and patches darkening the mountain sides look like mosses on a roof, and bring to mind Dr. Johnson's remarks on the trees of Scotland. His guide, anxious for the honor of Mull, was still talking of its woods and pointing them out. "Sir," said Johnson, "I saw at Tobermory what they called a wood, which I unluckily took for heath. If you show me what I shall take for furze, it will be something."
The mountain pine (Pinus monticola) is far the largest of the Sierra tree mountaineers. Climbing nearly as high as the dwarf albicaulis, it is still a giant in size, bold and strong, standing erect on the storm-beaten peaks and ridges, tossing its cone-laden branches in the rough winds, living a thousand years, and reaching its greatest size-ninety to a hundred feet in height, six to eight in diameter-just where other trees, its companions, are dwarfed. But it is not able to endure burial in snow so long as the albicaulis and flexilis. Therefore, on the upper limit of its range it is found on slopes which, from their steepness or exposure, are least snowy. Its soft graceful beauty in youth, and its leaves, cones, and outsweeping feathery branches constantly remind you of the sugar pine, to which it is closely allied. An admirable tree, growing nobler in form and size the colder and balder the mountains about it.
The giants of the main forest in the favored middle region are the sequoia, sugar pine, yellow pine, libocedrus, Douglas spruce, and the two silver firs. The park sequoias are restricted to two small groves, a few miles apart, on the Tuolumne and Merced divide, about seventeen miles from Yosemite Valley. The Big Oak Flat road to the valley runs through the Tuolumne Grove, the Coulterville through the Merced. The more famous and better known Mariposa Grove, belonging to the state, lies near the southwest corner of the park, a few miles above Wawona.
The sugar pine (Pinus Lambertiana) is first met in the park in open, sunny, flowery woods, at an elevation of about thirty-five hundred feet above the sea, attains full development at a height between five and six thousand feet, and vanishes at the level of eight thousand feet. In many places, especially on the northern slopes of the main ridges between the rivers, it forms the bulk of the forest, but mostly it is intimately associated with its noble companions, above which it covers in glorious majesty on every hill, ridge, and plateau from one extremity of the range to the other, a distance of five hundred miles,--the largest, noblest, and most beautiful of all the seventy or eighty species of pine trees in the world, and of all the conifers second only to King Sequoia.
A good many are from two hundred to two hundred and twenty feet in height, with a diameter at four feet from the ground of six to eight feet, and occasionally a grand patriarch, seven or eight hundred years old, is found that is ten or even twelve feet in diameter and two hundred and forty feet high, with a magnificent crown seventy feet wide. David Douglas, who discovered "this most beautiful and immensely grand tree" in the fall of 1826 in southern Oregon, says that the largest of several that had been blown down, "at three feet from the ground was fifty-seven feet nine inches in circumference" (or fully eighteen feet in diameter); "at one hundred and thirty-four feet, seventeen feet five inches; extreme length, two hundred and forty-five feet." Probably for fifty-seven we should read thirty-seven for the base measurement, which would make it correspond with the other dimensions; for none of this species with anything like so great a girth has since been seen. A girth of even thirty feet is uncommon. A fallen specimen that I measured was nine feet three inches in diameter inside the bark at four feet from the ground, and six feet in diameter at a hundred feet from the ground. A comparatively young tree, three hundred and thirty years old, that had been cut down, measured seven feet across the stump. was three feet three inches in diameter at a height of one hundred and fifty feet, and two hundred and ten feet in length.
The trunk is a round, delicately tapered shaft with finely furrowed purplish-brown bark, usually free of limbs for a hundred feet or more. The top is furnished with long and comparatively slender branches, which sweep gracefully downward and outward, feathered with short tasseled branchlets, and divided only at the ends, forming a palmlike crown fifty to seventy-five feet wide, but without the monotonous uniformity of palm crowns or of the spires of most conifers. The old trees are as tellingly varied and picturesque as oaks. No two are alike, and we are tempted to stop and admire every one we come to, whether as it stands silent in the calm balsam-scented sunshine or waving in accord with enthusiastic storms. The leaves are about three or four inches long, in clusters of five, finely tempered, bright lively green, and radiant. The flowers are but little larger than those of the dwarf pine, and far less showy. The immense cylindrical cones, fifteen to twenty or even twenty-four inches long and three in diameter, hang singly or in clusters, like ornamental tassels, at the ends of the long branches, green, flushed with purple on the sunward side. Like those of almost all the pines they ripen in the autumn of the second season from the flower, and the seeds of all that have escaped the Indians, bears, and squirrels take wing and fly to their places. Then the cones become still more effective as ornaments, for by the spreading of the scales the diameter is nearly doubled, and the color changes to a rich brown. They remain on the tree the following winter and summer; therefore few fertile trees are ever found without them. Nor even after they fall is the beauty work of these grand cones done, for they make a fine show on the flowery, needle-strewn ground. The wood is pale yellow, fine in texture, and deliciously fragrant. The sugar, which gives name to the tree, exudes from the heart wood on wounds made by fire or the axe, and forms irregular crisp white candy-like masses. To the taste of most people it is as good as maple sugar, though it cannot be eaten in large quantities.
No traveler, whether a tree lover or not, will ever forget his first walk in a sugar-pine forest. The majestic crowns approaching one another make a glorious canopy, through the feathery arches of which the sunbeams pour, silvering the needles and gilding the stately columns and the ground into a scene of enchantment.
The yellow pine (Pinus ponderosa) is surpassed in size and nobleness of port only by its kingly companion. Full-grown