Royal Horticultural Society - Royal Horticultural Society
- 21 nov 2014
- https://www.rhs.org.uk/plants/search-form
- Royal Horticultural Society
Evidence-based Complementary and Alternative Medicine - Evidence-based Complementary and Alternative Medicine
- http://www.hindawi.com/journals/ecam/
- Hindawi
Germplasm Resources Information - Germplasm Resources Information
- 21 nov 2014
- http://www.ars-grin.gov/
- U.S. Department of Agriculture
Medicinal Plants of the World - Medicinal Plants of the World
- Ben-Erik van Wyk
- Michael Wink
- 2010
- Timber Press
- 4th
- 480
Encyclopedia of Herbal Medicine - Encyclopedia of Herbal Medicine
- Andrew Chevallier
- 2000
- Dorling Kindersley Adult
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