Johnny:
That is very nice of your wife to volunteer at the Dr. Still center. While there, she will likely encounter one or more person who claims to an "expert" on Dr. Still and the herbal medicine he produced and used in his practice. The truth is, however, that no records remain from Still's practice, so the only sure and accurate source that correctly identifies a limited number of the herbs and plants he used Is his self-published autobiographical volume. Anything beyond the ingredients contained in his book is speculation at best or pure fiction at worst.
Dr. Still autobiography should be required reading in every high school in the nation. It is tantamount to sacred American scriptures.
If I can be of any assistance to your, please don't hesitate to send me a PM.
Best regards,
Jerseyman