The Spell of the Rockies

by Enos A. Mills

In climbing up the steep hillside above the river, I found many nests of hickory and walnuts against the upper side of fallen logs. Upon the level hill-top the ground beneath the tree was thickly covered with fallen nuts; only a few of these had got a tree's length away from the parent. Occasionally, however, a wind-gust used a long, slender limb as a sling, and flung the attached nuts afar.

The squirrels were active, laying up a hoard of nuts for winter. Many a walnut, hickory, or butternut tree at some distant place may have grown from an uneaten or forgotten nut which the squirrels carried away.

The winged seeds are the ones that are most widely scattered. These are grown by many kinds of trees. From May until midwinter trees of this kind are giving their little atoms of life to the great seed-sower, the wind. Most winged seeds have one wing for each seed and commonly each makes but one flight. Generally the lighter the seed and the higher the wind, the farther the seed will fly or be blown.

In May the silver maple starts the flight of winged seeds. This tree has a seed about the size of a peanut, provided with a one-sided wing as large as one's thumb. It sails away from the tree, settling rapidly toward the earth with heavy end downward, whirling round and round as it falls. Red maple seeds ripen in June, but not until autumn does the hard maple send its winged ones forth from amid the painted leaves.

The seed of an ash tree is like a dart. In the different ashes these are of different lengths, but all have two-edged wings which in calm weather dart the seed to the snowy earth; but in a lively wind they are tumbled and whirled about while being unceremoniously carried afar; this they do not mind, for at the first lull they right themselves and drop in good form to the earth.

Cottonwoods and willows send forth their seeds inclosed in a dainty puff or ball of silky cotton that is so light that the wind often carries it long distances. With the willow this device is so airy and dainty that it is easily entangled on twigs or grass and may never reach the earth. The willow seed, too, is so feeble that it will often perish inside twenty-four hours if it does not find a most favorable germinating-place. This makes but little difference to the willows, for they do not depend upon seeds for extension but upon the breaking off of roots or twigs by various agencies; these pieces of roots or twigs often are carried miles by streams, and take root perhaps at the first place where they go around.

The seeds of the sycamore are in balls attached to the limbs by a slender twiglet. The winter winds beat and thump these balls against the limbs, thus causing the seeds to loosen and to drop a few at a time to the earth. Each seed is a light little pencil which at one end is equipped with a whorl of hairs,—a parachute which delays its fall and thus enables the wind to carry it away from the parent tree.

The conifers—the pines, firs, and spruces—have ingeniously devised and developed their winged seeds for wind distribution. Most of these seeds are light, and each is attached to a dainty feather or wing which is used on its commencement day. These wings are as handsome as insects' wings, dainty enough for fairies; they are purple, plain brown, and spotted, and so balanced that they revolve or whirl, glinting in the autumn sun as they go on their adventurous wind-blown flight to the earth. A high wind may carry them miles.

With the pines and spruces the cones open one or a few scales at a time, so that the seeds from each cone are distributed through many days. The firs, however, carry cones that when ripe often collapse in the wind. The entire filling of seeds are thus dropped at once and fill the air with flocks of merry, diving, glinting wings. A heavy seed-crop in a coniferous forest gives a touch of poetry to the viewless air.

The lodge-pole pine is one of the most patient and philosophical seed-sowers in the forest. It is a prolific seed-producer and has a remarkable hoarding characteristic,—that of keeping its cones closed and holding on to them for years. Commonly a forest fire kills trees without consuming them. With the lodge-pole the fire frequently burns off the needles, leaving the tree standing, but it melts the sealing-wax on the cones. Thus the fire releases these seeds and they fall upon a freshly fire-cleaned soil,—a condition for them most favorable.