ZARZA PARRILLA.
Zarza parrilla is the root of a green, creeping plant, armed at intervals with very small thorns. It has leaves almost a span long, from the beginning of which proceed two tendrils, with which it entwines itself with other plants. The flowers grow in clusters, and give place to berries, which are first green, then red, and when quite ripe, black, and wrinkled like dry cherries, which they resemble in size and form. This plant is called by the Spaniards zarza parrilla, on account of its thorns, for zarza in Spanish means a thorny plant; parrilla, in the same language, signifies a gridiron; as therefore the leaves of this plant bear some sort of resemblance to a gridiron, three pretty large veins running lengthways, crossed by a number of smaller ones, it has received the name parrilla or gridiron; but botanists call it smilax aspera Peruviana, or sarmentum Indicum. The zarza parrilla is very common on the banks of the Uruguay, and the Rio Negro, the waters of which are celebrated for their salubrity; it is also found near the Rio Tercero, in the territories of Sta. Fè, and other parts of America. The most famous is that which comes from the bay of Honduras. The roots of the zarza parrilla, which possess a medicinal virtue, are scarce thicker than a goose's quill, wrinkled on the surface, and of a dusky colour, but white within; all of them grow from the same joint or knot of the plant. They have no particular taste or smell. They consist of rosin, and gum which is the softer part of them. The various uses of these roots are too well known to physicians to need an explanation from me.