Iris. Fig. 2.—Small portion of cross-section

Fig. 2.—Small portion of cross-section of same rhizome more highly magnified, showing portions of cortex, cylinder-sheath and central cylinder.
a, intercellular space in cortex;
b, cylinder-sheath;
c, xylem of one of the bundles. in exterior portion of central cylinder. Magnification, 100 diameters.

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

Fig. 2.—Small portion of cross-section