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.

You very likely wonder how the Wallflower or any other plant can grow
upon the wall, for there is no earth to be seen--nothing but stones and
crumbling mortar. But if we pull up one of the smaller plants we shall
find earth clinging to its roots. Dry dusty earth has been blown upon
the wall by wind, and has lodged in chinks and holes. Dust and soil,
too, were mixed with the mortar when the wall was built; and dead leaves
falling on it and decaying have produced a little more--for decayed
leaves make earth or "soil." Wallflowers and other plants which grow on
walls and rocks find very little soil sufficient for their needs.

Most of the blossoms of the wallflowers upon this wall are of a golden
yellow colour and are very sweet. Some of the blossoms are, however, a
darker yellow than others, and here and ther