R. Upton, A. Graff, G. Jolliffe, R. L?nger, E. Williamson,Editors, ,American Herbal Pharmacopoeia: Botanical Pharmacognosy - Microscopic Characterization of Botanical Medicines (2011) CRC Press,Boca Raton, FL, USA 978-1-4200-7326-3 810 pp., numerous colo