I personally have a copy of Medical Herbalism by David Hoffman ( go to amazon /Medical-Herbalism-Principles-Practices-Medicine/dp/0892817496). It is a wonderfully put together scientific compendium of plants, their uses, known bio and phytochemistry, useful parts, and methods of application. One of my favorite purchases to date!
My first thought in reading your comment was that I had a couple of books to recommend, but then I pulled them out and well... they don't quite hit the mark on medicinal info that I'd remembered. That said, the recommended reading in the back of THE NEW AMERICAN HERBAL, which is more about growing herbs than medicinal uses, has some interesting recommendations. This one seems the most promising: https://smile.amazon.com/Medical-Herbalism-Principles-Practices-Medicine/dp/0892817496/
Not to hijack OP's post, but this book might be of interest to you: Medical Herbalism
David Hoffman's <em>Medicinal Herbalism</em>. Considered the quintessential medicinal textbook on herbalism.
The Modern Herbal Dispensatory: A Medicine Making Guide This book is science based, however, the first 8-10 chapters are purely on the manufacture of herbal medicines.
Herbal Formularies by Dr. Jill Stansbury Written by an M.D, if that's the road you want to go on. This is definitely a formulary for a physician, and is one of my favorite formularies to peruse. Note that there are three books in this series, not just this one.
You may also look for some phytochemistry texts such as Yarnell's Phytochemistry and Pharmacy for Practitioners of Botanical Medicine, but that list should be sufficient for your purposes I think.
If you should want to include any thing about classical herbalism, I'd highly recommend Matthew Wood's Earthwise Herbal, Vol. I and II. Absolutely delightful read into the classical systems of herbalism. Also, I have more books aside from the ones mentioned here; if you need any further suggestions please don't hesitate to ask!
>I would also be interested in your top five medicinal wild plants (from anywhere) - the ones you think really do work, and are the most useful.
The list is far too long, because a great deal of plants do work. If you asked me to pick five, which I can't do, I'd pick elderberries, yarrow, ghost pipe, and toothache plant just because it's a dear favorite of mine. Milk thistle otherwise!
They will stay in the sprouting stage for quite some time. At least a momth or. During this time a lot of the plants energy is focused on the roots which is why it is such a hardy plant in its adult stage. for efficient germination ive heard of people using gibberellic acid but this is not something I have tried and have not found much info on how that works. Some of my favorites include Medical Herbalism: The Science Principles and Practices Of Herbal Medicine which really explains in great detail the ins and outs of herbal medicine but not much of the cultivation side, Forest Plants of the Southeast and Their Wildlife Uses gave me new insight of plants ive never heard of that I currently grow a lot of now, This is the textbook I used and its very hardcore, and This is a the most informative for intermediate growers but can be hard to understand at times as it goes into biochemistry. Hope this helps