Fig. 2.—Small portion of longitudinal section made well toward the cambium zone and parallel to it. Magnification about 75 diameters.
a, crystal of calcium oxalate;
b, a medullary ray cell containing starch;
c, sieve tube;
d, medullary cell.

This image is from Structure of our Cherry Barks in the September issue of the American Journal of Pharmacy, 1895.