P. Vergilius Maro, Georgics
J. B. Greenough, Ed.

First, nature's law
For generating trees is manifold;
For some of their own force spontaneous spring,
No hand of man compelling, and possess
The plains and river-windings far and wide,
As pliant osier and the bending broom,
Poplar, and willows in wan companies
With green leaf glimmering gray; and some there be
From chance-dropped seed that rear them, as the tall
Chestnuts, and, mightiest of the branching wood,
Jove's Aesculus, and oaks, oracular
Deemed by the Greeks of old. With some sprouts forth
A forest of dense suckers from the root,
As elms and cherries; so, too, a pigmy plant,
Beneath its mother's mighty shade upshoots
The bay-tree of Parnassus. Such the modes
Nature imparted first; hence all the race
Of forest-trees and shrubs and sacred groves
Springs into verdure. Other means there are,
Which use by method for itself acquired.
One, sliving suckers from the tender frame
Of the tree-mother, plants them in the trench;
One buries the bare stumps within his field,
Truncheons cleft four-wise, or sharp-pointed stakes;
Some forest-trees the layer's bent arch await,
And slips yet quick within the parent-soil;
No root need others, nor doth the pruner's hand
Shrink to restore the topmost shoot to earth
That gave it being. Nay, marvellous to tell,
Lopped of its limbs, the olive, a mere stock,
Still thrusts its root out from the sapless wood,
And oft the branches of one kind we see
Change to another's with no loss to rue,
Pear-tree transformed the ingrafted apple yield,
And stony cornels on the plum-tree blush.