BOOK XVII. xi. 64-.iii. 67
from a cutting from the root or from a slip; but the citron needs a warm situation, whereas the sorb requires a cool and damp one.
Tree Nurseries.XII. Nature has also taught the art of making Tree nurseries, as from the roots of many trees there shoots up a teeming cluster of progeny, and the mother tree bears offspring destined to be killed by herself, inasmuch as her shadow stifles the disorderly throng—as in the case of laurels, pomegranates, planes, cherries and plums; although with a few trees in this class, for instance elms and palms, the branches spare the young suckers. But young shoots of this nature are only produced by trees whose roots are led by their love of sun and rain to move about on the surface of the ground. All of these it is customary not to put in their own ground at once, but first to give them to a foster-mother and let them grow up in seed-plots, and then change their habitation again, this removal having a marvellously civilizing effect even on wild trees, whether it be the case that, like human beings, trees also have a nature that is greedy for novelty and travel, or whether on going away they leave their venom behind when the plant is torn up from the root, and like animals are tamed by handing.
Growing from slips and suckers.XIII. Also Nature demonstrated another kind of propagation resembling the previous one, and suckers torn away from trees continued to live; in this procedure the slips are torn away with their haunch as well, and carry off with them some portion also from their mother's body with its fibrous substance. This is a method used in striking pomegranates, hazels, apples, sorbs, medlars, ash plants, figs, and above all vines; but the quince if struck in this way deteriorates in quality. From the same method a way was
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