ROGK POOLS AND PONDS 87 



the stream is only intended as a watercourse to convey 

 the water to the pond, or is to form in itself a special 

 feature of the garden. In the former case, it may be 

 only a few inches across, and may be edged with trailing 

 plants and others that benefit by moisture. On the 

 other hand, a larger stream, needing scarcely any more 

 water, may be made and ornamented with water-loving 

 plants. If only intended as a watercourse for supply 

 purposes, it will do if but a few inches deep, and may 

 be formed with stones set in the soil and grouted with 

 cement, or it may be made of greater width a foot 

 or so deep, and provided with little stone barriers to 

 keep a steady depth of water and to carry off any over- 

 flow. Either this or the smaller stream may open out 

 into a little pool, whence the surplus water again 

 may flow to the larger pond. 



Let us take the larger stream, from one to two or 

 three feet across. It should be constructed of puddled 

 clay, concrete, or stones with cement run between. 

 It ought, however, to be formed with rough stones 

 above the water line at least, so that they may be decor- 

 ated with rock plants. In such a stream some of the 

 moisture-loving Irises, such as I. sibirica, I. Kaempferi 

 or laevigata, Monspur, and others, will grow together 

 with Spiraeas, Astilbes, Mimulus luteus, and many 

 others. There is hardly any limit, save that created by 

 considerations of space, to the charming effects that 

 may be produced by a little stream in the garden. Besides 

 swelling out into a tiny pool, it may be made to supply 



