You can have no hardier Roses than the Ayrshires, which are forms of Rosa repens capreolata (the National, by the way, sticks to the old name, now considered merely a synonym, Arvensis). The Ayrshires grow well on walls arbours, and old trees. They bloom in clusters. Bennett's Seedling, often grown under the name of Thoresbyana, a white, is perhaps the best known nowadays, but the old pink-edged Dundee Rambler is not forgotten. The Ayrshires must be very little pruned. Thinning out old flowered wood is all that is necessary.
There are two well-known Banksian Roses, the White, Banksiae, and the Yellow. They are strong growers, given a warm, sheltered wall, but have very small double flowers. No hard cutting back, if you please, for the Banksians. Do it, and you get no flowers. Thin, certainly.
Where do the Bourbons begin, where do they end? When we learn that the Bourbon Rose is Rosa indica borbonica, a variety of the China or Monthly Rose, we only learn half the story. There is Bourbon blood in the Hybrid Perpetuals without a doubt. The section can never be unimportant while it contains the dear old Souvenir de la Malmaison, with its wealth of silvery flowers. Then there is Madame Isaac Pereire; and, if we stretch a point in a sort of go-as-you-please business, there are the pretty Blairii No. 2, a rare old climber, and Charles Lawson, grandest of "specimen" Roses. Best of all, perhaps, there is Bardou Job, which is flowering gloriously on the wall of my house at this moment. The National catalogue makes a H.T. of him. Bardou Job is a very rich Rose, only semi-double, but a wonderful bloomer.
A small class, no use for exhibition, but good for growing on walls, where they give barrowloads of flowers. Think of Amadis, crimson, and of Gracilis, pink. Thin the wood, no more.
Varieties, these, of Rosa indica, the blood of which flows through the veins of our noble Hybrid Perpetuals. There are some old favourites amongst them, to wit, the Old Blush (common Monthly), Mrs. Bosanquet, and Fellenberg, the last one of the finest of bedding Roses, as Kew teaches us. Amongst more modern favourites are Laurette Messimy, rose and yellow, semidouble; and Madame Eugene Résal, rose, shaded with orange. Thinning, and a moderate shortening of soft, unripe wood in spring, does for these.
The Evergreens, varieties of Rosa sempervirens, are all very hardy and strong-growing Roses, well suited for covering walls where choicer, though less hardy, varieties will not thrive. Félicité Perpétue, creamy white, may be taken as representative of the class. Little pruning is wanted.
A small class, of more interest than importance. It gives us Rosa Mundi (Village Maid), with its pretty striped flowers, and the York and Lancaster, which is often confounded with Rosa Mundi, although it is not always striped.