Cimicifuga. Fig. 1.—Diagram of cross-section

Fig. 1.—Diagram of cross-section of a small rhizome of Cimicifuga, magnified 6 diameters.
a, cork;
b, middle bark;
c, phloem mass or bast;
d, xylem of a bundle;
e, cambium zone;
f, pith.

This image is from Structure of Cimicifuga in the American Journal of Pharmacy, 1895.