To conceal the cemented bank of a pool or stream, make a shoulder eight inches or so wide and about six inches below the water line. Then place small rocks on the shoulder
Dispose the rocks very irregularly, but they may be so few as to be mere notes. Avoid stagnant water, and if mosquitoes are feared introduce some goldfish. They like mosquito larvæ.
Water lilies and sagittaria—one plant will do if the pool is small—in the water and near it, but not in standing water, Japanese iris, yellow flag, globe flower, and Lythrum roseum are good selections.
Forget-me-not is one of the finest plants for the banks. Use the perennial kind (Myosotis palustris semperflorens).
The bog garden simply reproduces bog conditions. As a rock garden adjunct it may be a small spot with the perpetually moist and moss-covered soil in which the native cypripediums and pitcher plants flourish. Eighteen or twenty inches of suitable soil, a mixture of leaf mold, peat, and loam, in which has been stirred some sand and gravel, must be provided. If an artificial bog, the bottom may be made of cement or puddled clay.
Transcriber's Note:
A spelling error has been corrected: "Polemonicum" to "Polemonium" ([Page 41])