Watercolour illustration from the Badianus Manuscript, an Aztec herbal in Latin by Juan —Courtesy of the Vatican Library, Vatican City
Ancient manual of plants used for medicinal purposes. Hundreds or thousands of medicinal plants were known in ancient India, China, and Greece and medieval Europe. In the late 16th century, European herbals began to include plants from the Western Hemisphere. Their accuracy varies widely, but many of the plants in herbals later became sources for drugs (e.g., digitalis).