Since Sir Henry Yorke's bog garden is naturally composed of peaty soil he could choose nothing more appropriate for covering the ground beneath shrubs than heaths of all kinds. These ericas and dabcecias are evergreen, and have a considerable variety in colour and season of bloom.
Another ground cover which he uses in great quantity is London pride (Saxifraga umbrosa), which I have praised elsewhere for its evergreen rosettes and its airy masses of dainty, white flowers. Most of the famous saxifrages cultivated in England are out of the question for America, but London pride is a British wild flower which I hope some day to see naturalized in American woods, growing by the million and furnishing an evergreen carpet to delight eye and foot the year round.
He also showed me three pretty little creepers of which I must say a word. The first is a midget called Gunnera Ma-gellanica (see plate 35). You would never guess its relationship to the species with the titanic leaves. It is a lovely plant for the margin of a pool. It takes to water like a duck, and it is amusing to see this hardy little Patagonian creeper ride over the surface of a miniature lake.
The second (pictured at plate 100) is the bog pimpernel (Anagallis tenella), a British plant related to the "poor man's weather-glass." It bears myriads of tiny pink flowers, and is also admirable for its slender stems and the beauty of its paired leaves.
Third is the ivy-leaved bellflower (Wahlenbergia hederacea) which bears a great many pale bluish-purple flowers, not half an inch long, in summer and autumn. The blossoms droop in the bud, stand nearly erect when in full bloom, and often droop again when in fruit. It is as innocent and appealing as a baby, with its thread-like branches and its diminutive leaves that mimic those of the ivy. This, also, is a British plant.