The case is different with the giant thistle (with variegated leaves) of the Pampas, for I met with it in the valley of the Sauce.

According to the principles so well laid down by Mr.Lyell, few countries have undergone more remarkable changes, since the year 1535, when the first colonist of La Plata landed with seventy-two horses.

The countless herds of horses, cattle, and sheep, not only have altered the whole aspect of the vegetation, but they have almost banished the guanaco, deer, and ostrich.

Numberless other changes must likewise have taken place; the wild pig in some parts probably replaces the peccari; packs of wild dogs may be heard howling on the wooded banks of the less-frequented streams; and the common cat, altered into a large and fierce animal, inhabits rocky hills.
As M.d'Orbigny has remarked, the increase in numbers of the carrion-vulture, since the introduction of the domestic animals, must have been infinitely great; and we have given reasons for believing that they have extended their southern range.

No doubt many plants, besides the cardoon and fennel, are naturalised; thus the islands near the mouth of the Parana are thickly clothed with peach and orange trees, springing from seeds carried there by the waters of the river.
While changing horses at the Guardia several people questioned us much about the army,--I never saw anything like the enthusiasm for Rosas, and for the success of the "most just of all wars, because against barbarians." This expression, it must be confessed, is very natural, for till lately, neither man, woman, nor horse was safe from the attacks of the Indians.