One or two specimens of the following plants are of little use, except in the very small pool ; they look their best when planted in masses, an effect they will achieve in time of their own accord. They propagate either from seeds falling in the water in Autumn or from runners.

Anthemis or Water Camomile. Small yellow flowers and tiny leaves are the principal features of this plant. It will grow in a few inches of water and, when established, will provide a splendid mass of colour.

Caltha or Marsh Mangold. No pond should be without its corner of marigolds. The foliage is beautiful and the flowers, golden coloured, will be blooming long before the lilies are in bud or the sagittarias have even thought of flowering.

Calla or Bog Arum. Just as the marigold provides the Spring colours, so this arum brightens the pool in Autumn with its bright red seeds. Although referred to as the ' bog' arum it thrives best in a few inches of water. Dracocephalum or Dragon's Head. A profusion of pink flowers is the principal feature of this delightful waterside plant. It will soon establish itself in a few inches of water.

Mentha or Water Mint. This is one of the hardiest and also one of the most valuable of waterside plants. The strong, mint-like odour, although unpleasant to many people, has the quality of keeping the water sweet. The bluish-lavender flowers are borne in clusters rising above the dark green leaves. It is as hardy as it is possible for a plant to be, and will bear transplanting at almost any time of the year. Whether in six inches of water or just damp ground this plant is always happy.

Myosotis or Forget-me-not. This is one of the most delightful of all aquatic plants and when grown massed alongside a clump of marigolds the effect is most striking. The flowers are similar in colour to the common, or garden, variety, but they are much larger in size.

Water Lobelia. Lobelia is rather more difficult to grow than some of the other aquatic plants. Still, it is a good oxygenator and carpets the bottom with its thick, bright green leaves. The stems are very thin and bear numerous lavender coloured flowers.