Robert Dale Rogers has been working with flower essences for nearly forty years. He is a professional member of the American Herbalist Guild and has written 37 books on plants and fungi of the boreal forest. The Fungal Pharmacy: The Complete Guide to Medicinal Mushrooms and Lichens of North America is a great resource for health practitioners.
He is an assistant clinical professor in family medicine at the University of Alberta, and teaches both introductory and advanced flower essence courses at the Northern Star College of Mystical Studies.
His newest book Mushroom Medicines for the Soul: Fungi Essences and Spiritual Growth will be published in Fall of 2015.