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The first two years' growth, especially the first year's growth on anytree or shrub, the twigs of which have a definite colour, is muchbrighter than the colour of the twigs after they are more than twoyears old and are becoming definite branches of the plant. This is asuggestion that severe pruning, or cutting back, will often enhance theeffect, as in the case of the red-twigged dogwood. Twigs are also extremely interesting because of the markings. Thetamarix and silky dogwood are types to study in detail as well as beingvaluable for the mass colour effect seen at a distance. Colour effects of twigs form the most interesting feature of land-scape twig effects, and yet the coverings of older branches and treetrunks on many trees are very effective in summer and winter. Everytree has its individual markings of trunk and branches, of great in-terest to the landscape student. The white oak, white birch, planetree, and hackberry, with their peculiar bark, are valuable in landscapeplanting. |
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