_Antirrhinums_ (_Snapdragons_).—We think the good dwarf ones are charming on rockeries. We once had some pink ones grown from Sutton’s seed that were as pretty as little Rose-bushes. On walls some of the taller ones often look well, and when they are self-sown they seem to flourish in chinks where there cannot be much food for them. If you have a wall you should sow a little seed, and be careful not to mistake the seedlings for weeds. _Anthericum Liliastrum_ (_St. Bruno’s Lily_).—A charming plant, growing from one to two feet high, and flowering in May or June. It likes a sandy loam. If you want to increase it, you can divide it in the autumn. _Arabis._—If you are a London child, you will have seen this with London Pride in every London rock garden. It is the commonest of rock plants, and its white flowers make a pleasant show near Aubrietias and Alyssum in spring. _Arenaria Balearica._—This is the little creeping mossy plant we have told you of already. Put a bit on some soil near any stones you want covered. _Aubrietias._—You must know these if you have ever looked at a garden in spring. They are in various shades of mauve and purple, and make great sheets of colour on walls and rockeries. It is sometimes called Purple Rock-Cress. You can divide them in autumn, or you can grow them from seed sown in May or June. _Campanulas._—There are many varieties of blue and white Harebells that do well on walls and rockeries. Pumila, Pulla, and Cæspitosa are three well-known dwarf ones. Isophylla is a good hanging one, but not quite hardy. Persicifolia is an easily-grown tall one. They are increased by division. _Helianthemums, or Sun Roses._—These must not be confused with the Cistus, or Rock Roses, which are charming, but not so hardy as the Helianthemums. If you grow them from seed sown in May or June, you should in the following year have a number of dwarf shrubs bearing single flowers in a variety of shades, ranging from white and yellow to bright crimson. _Iberis Sempervirens_ is often called Perennial Candytuft. We have known people buy it by its Latin name, and be much disappointed to find it was the well-known white flower they had seen in all their friends’ gardens. It is not proud, and will grow almost anywhere. _Iris Pumila and Iris Stylosa._—We mention two out of the many beautiful Irises suitable for a rockery. Try to get the variety of Pumila called Cœrulea, a lovely sky-blue. Stylosa is the scented Iris that flowers in winter. It likes sun and shelter, and dry, hard ground. It must be manured.