While we have been examining the flowers on the ground, the nut bushes above our heads are waiting to remind us of what we said just now--that trees also have flowers. The flowers of the nut bush or hazel are easily seen, for they appear before the leaves are open. What we see to-day are often called catkins, but the name which country children give them is lambs'-tails. It is a very good name, too, for they are more like the tail of some tiny lamb than anything else. These catkins are yellowish-white in colour, and soft and almost woolly to the touch. They hang in clusters from the hazel twigs, and in the strong March wind which blows to-day, they shake and flutter like the tails of lambs at play. Some of them leave a dusty powder on our fingers when we handle them; that is the pollen of the flower. It is not where these yellow "catkins" are dancing on the twigs to-day that the hazel nuts will appear in autumn. The nuts will grow on twigs where there are very small red flowers--something like tiny paint-brushes. These are the female flowers; they will be fertilized by the yellow pollen of the catkins, and will produce the nuts. CHAPTER III FLOWERS ON THE WALLS Behind the narrow strip of ground with flowers and shrubs on the other side of the drive there is a low stone wall. A piece of the lawn on which the mulberry tree stands has been cut away, and a flight of steps leads down to a little gate into the foldyard. This wall between the garden and the foldyard is very old and rough--not like the smooth brick walls you see in towns. The stones are of different shapes and sizes, the mortar has fallen out of it in many places, and here and there are holes and crevices. Yet it is a very beautiful old wall, for many things grow on it; mosses and grasses, and other flowers too, are there. On this May morning we not only see, but also smell, one of the flowers which grow upon the wall--it is the beautiful sweet-scented Wallflower. It grows here and there along the top of the wall, and a few plants of it are even springing from the sides. Some of the plants are quite large and their stems are tough. These have grown here for a long time. The Wallflower is a perennial plant; unless it is killed or torn up by the roots it will live and grow for many years. Others are quite young and only a few inches high. These have grown from seeds dropped last autumn by the older plants.