Recommended List of Trees
The maples, of which there are a great many, ranging in size from mere bushes in some forms of Acer palmatum to large trees. All are deciduous. All forms of Acer palmatum are suitable for garden planting, most colour brilliantly in autumn and some have finely divided leaves.
Also good are Acer griseum, with peeling cinnamon-coloured bark; Acer pensylvanicum, with smooth green bark striped with white; Acer negundo in two varieties, ‘Aureum’ with yellow leaves and ‘Variegatum’ with light green and white leaves; Acer platanoides ‘Crimson King’, fast-growing with-red leaves, and Acer pseudoplatanus ‘Brilliantissimum’ a very slow-growing sycamore with pink, cream and light green leaves.
The birches. Our native birch, Betula pendula, has fine weeping varieties such as `Trisitis’, `Youngii’ and ‘Dalecarlica’, the last with deeply cut leaves. Good white-stemmed kinds are Betula ermanii and Betula utilis.
The hornbeam, which looks like beech and is best planted in its pyramidal variety, `Fastigiata’.
Three genera,, and , contribute to this very large and valuable group of evergreen coniferous trees.
It is the columnar and coloured-leaved (yellow, grey, and blue-green) varieties that are most worthwhile. Good forms of Chamaecyparis law- soniana are `Allumii Aurea’, `Columnaris’, ‘Ell- , ‘Erecta’, `Kilmacurragh’, `Lanei Aurea’ and ‘Winston Churchill’. Good forms of Cupressus macrocarpa, which grows faster but is not so hardy, are `Donard Gold’ and `Goldcrest’. Cupressus glabra ‘Pyramidalis’ is tall, narrow and grey-green.
Yellow forms of Cupressocyparis leylandii, which are fully hardy and very fast growing, are `Castlewellan’ and ‘Robinson’s Gold’.
Long trails of yellow flowers in May-June.
The best tree magnolias for general planting are the various forms of M. soulangiana. All make wide, multi-branched plants. Their cupped flowers vary from pure white in ‘Alba Superba’ to wine red in ‘Rustics Rubra’ and ‘Lennei’.
The crab-apples, of which there are a great many excellent kinds, some grown mainly for their flowers in spring, some for their coloured fruits in autumn. M. floribunda has pink and rose flowers, ‘Profusion’ is dark red, `Eleyi’ is similar with purple leaves, ‘Golden Hornet’ has yellow crabapples, and ‘John Downie’ red and yellow fruits excellent for jelly-making.
This huge genus includes all the almonds, peaches, cherries and plums, some of which are highly ornamental trees grown mainly for their flowers in spring, some also for their purple foliage. A fine pink-flowered almond is ‘Pollardii’. A good double-flowered pink peach is ‘Clara Meyer’. P. cerasifera ‘Pissardii’ is the purple-leaved plum with small pinkish-white flowers. P. subhirtella `Autumnalis’ has small white flowers in November and December; the variety `Autumnalis Rosea’ has pink flowers. Good spring-flowering ornamental cherries are `Ama-no-Gawa’, pink and narrowly erect, `Kanzan’, ‘Pink Perfection’ and `Shirofugen’, deeper pink and wide-spreading, `Tai-Haku’, white, and `Ukon’, pale yellow.
The false acacia, a tree with feathery leaves best planted in its yellow-leaved variety `Frisia’.