Post 00120
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Down in the main cañons adjoining the azalea and rose gardens there are fine beds of herbaceous plants,—tall mints and sunflowers, iris, œnothera, brodiæa, and bright beds of erythræa on the ferny meadows. Bolandera, sedum, and airy, feathery, purple-flowered heuchera adorn mossy nooks near falls, the shading trees wreathed and festooned with wild grapevines and clematis; while lightly shaded flats are covered with gilia and eunanus of many species, hosackia, arnica, chænactis, gayophytum, gnaphalium, monardella, etc.
Thousands of the most interesting gardens in the Park are never seen, for they are small and lie far up on ledges and terraces of the sheer cañon walls, wherever a strip of soil, however narrow and shallow, can rest. The birds, winds, and down-washing rains have planted them with all sorts of hardy mountain flowers, and where there is sufficient moisture they flourish in profusion. Many of them are watered by little streams that seem lost on the tremendous precipices, clinging to the face of the rock in lacelike strips, and dripping from ledge to ledge, too silent to be called falls, pathless wanderers from the upper meadows, which for centuries have been seeking a way down to the rivers they belong to, without having worn as yet any appreciable channel, mostly evaporated or given to the plants they meet before reaching the foot of the cliffs. To these unnoticed streams the finest of the cliff gardens owe their luxuriance and freshness of beauty. In the larger ones ferns and showy flowers flourish in wonderful profusion,—woodwardia, columbine, collomia, castilleia, draperia, geranium, erythræa, pink and scarlet mimulus, hosackia, saxifrage, sunflowers and daisies, with azalea, spiræa, and calycanthus, a few specimens of each that seem to have been culled from the large gardens above and beneath them. Even lilies are occasionally found in these irrigated cliff gardens, swinging their bells over the giddy precipices, seemingly as happy as their relatives down in the waterfall dells. Most of the cliff gardens, however, are dependent on summer showers, and though from the shallowness of the soil beds they are often dry, they still display a surprising number of bright flowers,—scarlet zauschneria, purple bush penstemon, mints, gilias, and bosses of glowing golden bahia. Nor is there any lack of commoner plants; the homely yarrow is often found in them, and sweet clover and honeysuckle for the bees.
In the upper cañons, where the walls are inclined at so low an angle that they are loaded with moraine material, through which perennial streams percolate in broad diffused currents, there are long wavering garden beds, that seem to be descending through the forest like cascades, their fluent lines suggesting motion, swaying from side to side of the forested banks, surging up here and there over island-like boulder piles, or dividing and flowing around them. In some of these floral cascades the vegetation is chiefly sedges and grasses ruffled with willows; in others, showy flowers like those of the lily gardens on the main divides. Another curious and picturesque series of wall gardens are made by thin streams that ooze slowly from moraines and slip gently over smooth glaciated slopes. From particles of sand and mud they carry, a pair of lobe-shaped sheets of soil an inch or two thick are gradually formed, one of them hanging down from the brow of the slope, the other leaning up from the foot of it like stalactite and stalagmite, the soil being held together by the flowery, moisture-loving plants growing in it.