Veratrum. Fig. 2. Diagram of half of cross-section of rhizome

Fig. 2.—Diagram of half of cross-section of rhizome magnified about five diameters.
a, section of root near its origin;
b, cylinder sheath;
c, one of the wavy bundles in cortex;
d, cortical parenchyma;
e, a bundle of the central cylinder;
f, parenchyma of the central cylinder.

This image is from Structure of Veratrum viride in the April issue of the American Journal of Pharmacy, 1895.