of the pith with reticulated markings.(Drawn with the 1/8-in. objective and the "A" eye-piece.)This image is from Coptis in the Drugs and Medicines of North America.
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.
http://www.henriettes-herb.com - Copyright 1995–2023 Henriette Kress.