He states that botanists are now generally agreed that the cardoon and the artichoke are varieties of one plant.

I may add, that an intelligent farmer assured me that he had observed in a deserted garden some artichokes changing into the common cardoon.

Dr.Hooker believes that Head's vivid description of the thistle of the Pampas applies to the cardoon, but this is a mistake.

Captain Head referred to the plant which I have mentioned a few lines lower down under the title of giant thistle.

Whether it is a true thistle, I do not know; but it is quite different from the cardoon; and more like a thistle properly so called.) I saw it in unfrequented spots in Chile, Entre Rios, and Banda Oriental.