Читать книгу Trees and Shrubs for English Gardens - E. T. Cook - Страница 43

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The best use of trees and shrubs with coloured or variegated foliage is not very easy to determine, though it may be possible to give a few useful suggestions. The usual way of planting them here and there among mixed masses of evergreen and deciduous growths is perhaps the worst way of all. All good planting must be done with much thought and care, and these plants of coloured foliage, that are necessarily more conspicuous than others, want the most careful placing of any.

One excellent use of evergreen trees and shrubs with golden colouring, such as the Gold Hollies, Cypresses, Yews, and Privets is to make them into a cheerful bit of outdoor winter garden. The Gold-leaved Privet is a delightful thing in early winter, and though Wild Privet, untouched by the knife, is a deciduous shrub, the clipped Privets of our gardens usually hold their leaves throughout the winter. With these the variegated Japan Honeysuckle might be freely used, much of its yellow veining turning to a bright red in winter. Cassinia fulvida is another good winter shrub with its tiny gold-backed leaves. The pretty bushes of this neat New Zealander are apt to grow somewhat straggling, but the crowded little branches are the very thing that is wanted through the winter as cut greenery to go with winter flowers, whether hardy or from under glass. If these are cut a foot long the bush is kept in shape, and a valuable supply of stuff for house decoration is provided.

A half or even quarter acre of well-arranged planting of these gold-variegated shrubs has a surprisingly cheery effect in winter, making a kind of sunlight of its own when skies are grey, and a comfortable shelter when winds are keen.

In summer, too, it will be beautiful if the spaces between the shrubs are cleverly planted, for preference, with plants of white or pale-yellow flowers, such as White Foxglove, Œnothera lamarckiana, white and pale-yellow Hibiscus ficifolius, Liliums auratum, giganteum, speciosum, and longifolium; White Everlasting Pea trained loosely through any near branches; Nicotiana affinis and N. sylvestris; and close to the path hardy Ferns of pale-green frondage, such as the Lady Fern; with clumps of plants of golden foliage like the Gold Valerian and Gold Nettle. A shrub of variegated foliage, planted without special attention, and coming suddenly in a grouping of others of an average green colour is made unduly conspicuous. It should be led up to by neighbours whose colouring gradually assimilates with its own. The sudden effect of colouring is all very well in the nurseryman's show borders, where the object is to attract attention to showy individuals, but in our gardens we want the effect of well-arranged pictures rather than that of shop windows.

TAURIAN TAMARISK (Tamarix tetrandra), IN FLOWER.

A variegated plant to be of real value in the garden must have clear, bright, and abundant red and yellow or white markings, not dotted or merely margined with colour. So many worthless shrubs with poor variegation have been named and offered for sale that it is unwise to buy them from a catalogue. We may repeat the advice already given, which is to see them first.

Trees and shrubs with coloured foliage are of several kinds. Most common of all are those which have leaves blotched or edged with golden or creamy yellow and white, such as the variegated Hollies and Elæagnuses. Then there are those which are only coloured at a certain season, like Neillia opulifolia aurea. This has leaves of a beautiful self yellow colour when they unfold in spring, but become green as the summer advances; or the variegated Plane (Platanus acerifolia Süttneri), which is only variegated in late summer and autumn.

Finally, there are those, like the Purple Hazel or Purple Beech, which have leaves of one colour and remain almost of the same shade whilst they are on the tree.

On the whole the plants that retain their colour till late summer and autumn, or acquire it then, are most valuable, because very few trees and shrubs are then in flower.

Variegated trees and shrubs must not be planted too plentifully, and studiously avoid all spotty effects. Many a garden would be improved by bringing the variegated shrubs it contains together so as to produce a few broad masses of colour. Some of these shrubs, like Spath's Cornel, or the Golden Elder, may, in large gardens especially, be planted alone in large beds or groups. The large trees, like the Purple Beech, can stand by themselves.

The following list contains about one hundred of the finest of variegated trees and shrubs:—