Botanical name: 

Cranesbill, Geranium maculatum, is found native to the lowlands and open woods throughout the temperate Eastern United States. Being one of the astringent domestic remedies used in the form of infusion or decoction in diarrhea, dysentery, sore mouth, and similar diseases, it thus came to the attention of physicians, whose use of it finally led to its place in the pharmacopeia. In Eclectic medication geranium is much valued, the drug occupying a well-established position in all the publications of that school of physicians.

The History of the Vegetable Drugs of the U.S.P., 1911, was written by John Uri Lloyd.