This image is from Gall or Dyer's Oak in Pereira's Elements of Materia Medica and Therapeutics, 1854.
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Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.
Plant Healer Magazine: Very relevant to the practitioner.
http://www.henriettes-herb.com - Copyright 1995–2018 Henriette Kress.