One of the guiding ideas that influenced us during the writing of this book was the thought of giving you the opportunity to foray into this unparalleled field of medicinal plants. I would dare to hope that the invitation launched will not be understood only as a call to a theoretical, imaginary journey, but, more than that, will materialize in a real, practical outing, "on the ground", that is, in nature, where medicinal plants still resist, despite human aggression and industrial pollution. Try to savor the miracle of endless diversity that is given to us by the Creator of nature for our good, that of people, and equally for our delight. Play with all the responsibility of "recognizing herbs" and you will see that you will have satisfactions that you may have overlooked until now.