Cascara amarga. Fig. 3. Transverse section

magnified 75 diameters. a, outer bark or cork; b, sclerenchyma cells; c, sclerenchymatous or bast fibres; d, parenchyma cells; e, medullary rays.

This image is from the article "Cascara Amarga—Honduras Bark." in the American Journal of Pharmacy, 1884.