Fig. 4. One of the bundles of the rhizome

Fig. 4.—One of the bundles of the rhizome, as seen in cross-section, magnified 370 diameters.
a, cell of parenchyma exterior to bundle;
b, cell of endodermis;
c, scalariform tracheid in xylem;
d, phloem tissues occupying centre of bundle.

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

Fig. 4. One of the bundles of the rhizome