Taylors Domestic Herbal is a good (and extremely early) example of the kind of medical literature sold by apothecaries and other figures at the dawn of the era of semi-standardized organic medicine. It deviates from the greater rigor in dosage and measurement from works beginning a few decades later (not to mention the wider variety of species available due to colonial importation), and from the often religiously or superstitiously-informed content in such works in the previous century.
It lists a wide variety of species both domestic and wild, and their usages- some are innocuous (like chamomile or turnips), while some are now generally regarded as highly toxic (like foxglove and datura.)
50 pages.