How to use this page
- Search by Latin or common name (e.g., Achillea, yarrow).
- Jump A–Z to scan alphabetically (use “0–9” for numerals).
- Filter by Action (e.g., astringent), Preparation (tincture, infusion), or System (digestive, immune).
- Reset with Clear to see the full index again.
What an entry includes
- Scientific + common names, parts used, primary actions, systems, preparations.
- Safety snapshot and links to related Studies when available.
- Consistent black-and-white, field-guide style illustrations for quick recognition.
Editorial standards: Educational, research-aware, and non-diagnostic. See our Editorial Policy and Sourcing & Citations.
Medical disclaimer: For general education only. Consult a qualified practitioner about individual use, especially with medications, pregnancy, or medical conditions.
Materia Medica A – Z
Our herbal encyclopedia with preparations, uses, safety notes, and research references.
R
Red Root Coming soon
Red-belted Conk Coming soon
Rehmannia glutinosa Rehmannia Coming soon
Reishi Coming soon
Reynoutria multiflora He Shou Wu (Fo-Ti) Coming soon
Rhodiola rosea Rhodiola Coming soon
Rosa canina Rose Hips Coming soon
Rosmarinus officinalis Rosemary Coming soon
Royal Jelly Coming soon
Rubus idaeus Red Raspberry Leaf Coming soon
Rumex crispus L.
AlterativeCholagogueDigestive (digestant)DiureticHepaticLaxativeLymphagogue