Trees and Shrubs for English Gardens

by E. T. Cook

WHITE MEDITERRANEAN HEATH (Erica mediterranea alba).

E. maweana.—This appears to be a fine variety of E. ciliaris, with larger leaves and flowers, even richer in colour and of sturdier growth. It was discovered in Portugal some thirty years or so ago by Mr. George Maw, but has not become popular notwithstanding its beauty. It was obtained for the Kew collection from Messrs. Cunningham and Fraser, of Edinburgh, three or four years ago, and certainly promises to be a better grower there than E. ciliaris. The flowers are rich crimson and in large racemes.

E. Watsoni.—This is a supposed natural hybrid between E. ciliaris and E. Tetralix, and was first discovered near Truro by Mr. H. C. Watson. It has rosy-crimson flowers produced in a flatter raceme than that of E. ciliaris. In this character and in other ways it is intermediate between the parents.

E. Tetralix (the Cross-leaved Heath or Bell Heather).—This beautiful Heath grows on most of the moors and mountain-sides throughout the British Isles, being perhaps the most widely spread of all the true Ericas in this country. It is called the "Cross-leaved Heath" because of the arrangement of the leaves, which are in whorls of four. It is not very distinct in general appearance from E. ciliaris, being downy and hairy on its young slender leaves, &c. It differs, however, in the arrangement of the flowers, which are in a terminal umbel. The leaves of E. ciliaris are usually in threes at each node, and, of course, its distribution in Britain is much more restricted than that of E. Tetralix. There are other minor points of difference that need not be referred to here. The "Cross-leaved Heath" grows 1 to 1½ feet high, and has bright rose-coloured flowers. There is a white-flowered variety (alba), and a very pubescent one named mollis.

E. Mackaii.—This is so closely allied to E. Tetralix that it is regarded merely as a variety by some authorities. It was first found in Galway in Ireland, between Roundstone Bay and Clifden. It has since proved to be a native also of Spain. It is a charming garden plant flowering from July to September. The leaves have the same right-angled arrangement as those of E. Tetralix, but the flower is shorter, broader, and of a paler rose.

E. vagans (Cornish Heath).—This Heath is one of the most useful of dwarf evergreens, growing vigorously, especially when planted in good soil. I think, however, it flowers better and has more of the typical Heath character when in somewhat poor, sandy soil. In England it is almost or quite confined to Cornwall, but occurs also in Ireland and South-West Europe. It is especially valuable in the garden because it flowers late, beginning in July and keeping on until October. Its flowers are crowded in racemes 4 to 6 inches long, and they are pinkish purple in colour. The plants may be kept neater and more compact by removing the flowering portion of the shoots before growth recommences in the following spring. Left to themselves, especially in soil that is at all rich, the plants are apt to get straggling and unkempt.

E. multiflora.—This belongs to the same type of Heath as E. vagans, the Cornish Heath, but differs in its more compact growth and shorter racemes of flowers. Although not so vigorous and showy, it may still be preferred for some situations. It is a neater plant, and its lower branches have not the same tendency to get sprawling and ungainly as E. vagans. In other respects it is much like that species, the leaves being of similar shape and arrangement, and the flowers of a paler purple; the raceme, however, is only 2 inches or so long. E. multiflora is not found in Britain, but is a native of the country to the north of the Mediterranean Sea from France to Greece.

Calluna vulgaris.—This has been named Erica (Heath), and may be appropriately included in this chapter on Heaths. It is the Common Heath of mountain and moor, is very closely allied to the true Heaths, and has given rise to many varieties. It likes a peaty or sandy soil, and is longer-lived and more profuse flowering under cultivation in poor rather than rich soil. It is very charming when grown in natural masses in the wilder parts of the garden, and its value is all the greater because it flowers when almost all other shrubs are out of bloom, viz., from July to October. Numerous varieties are offered by the trade, amongst which the following are the most noteworthy, either for their beauty or for their distinctness: Alba (white), Alporti (crimson), aurea (golden leaved), tenuis (red), pygmæa, and hypnoides (both dwarf).

Dabœcia polifolia (St. Dabeoc's Heath) is a lovely little shrub, a close relative of the Heaths, and found wild in the west of Ireland. It grows a little over 1 foot high, and bears bell-shaped flowers rather abundantly on erect terminal spikes. They are purple or white, and sometimes have both colours in one flower, and the plants continue to produce them from July or August till the frosts come. It is quite as plentiful as the dwarf Heaths. Alba is a white variety. Menziesia polifolia is its former name, and is still found under that title in books.