It's unfortunate that so many herbal resources in the modern world approach materia medica with an allopathic mindset.
They see herbs only for their chemistry, what they're "good for", and how they treat symptoms.
Most herb books don't give you the critical information you need to be an effective clinical herbal practitioner.
The most effective herbalists know their remedies beyond what symptoms and conditions they treat because they understand the how and why their remedies heal.
Holistic herbalism isn't about knowing what an herb is "good for." It isn't even about knowing the medicinal actions, chemistry, or energetics of a plant. It's about getting to know the essential healing pattern within each plant, of how every aspect weaves together into a complete whole.
What does that mean? It means that you learn to heal the whole person with the whole plant.