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American Trees Commonly: Absorption of water and essential mineral elements occurs in the remote (distal) portions of the root systems of trees. These terminal regions are embryonic zones composed of actively dividing and maturing cells with each apex protected by a root cap. Root hairs, which are probably the main absorptive sites, likewise commonly occur in the apical regions. Subsequent to entry into the root, the water and soil minerals are moved upward through the conducting tissues of root and stem into the leaves.
Flower.—Trees, like herbaceous plants, produce flowers. As a consequence of several factors, however, such as remoteness from the observer due to the size of trees, unfamiliar form and perhaps color, and relatively short life, the flowers of trees are less familiar structures.
The greenheart is perhaps the most important tree of Guyana and has been a principal export since the late 1700's. The wood, which is strong, very hard, and extremely decay-resistant in salt water, is used primarily for marine construction. The original Lock gates on the Panama Canal were made of this wood.
The species Tabebuia senratifolia, Colubrina ferruqinosa, and Zizyphus chloroxylon are other South American trees commonly trees also commonly referred to as "greenheart."
In a rustic garden the trees should be fruit trees wherever possible, or at least blossom trees of some kind. Apples, pears, plums, and cherries will all help to create the right atmosphere, as will nut trees such as hazel or almond. If there is space for a large tree, a Walnut might do. |
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