Cimicifuga. Fig. 5.—Drawing showing tetrarch radial bundle

Fig. 5.—Drawing showing tetrarch radial bundle of root of Cimicifuga, magnified 110 diameters. The section was from a young root, in which the meditullium had undergone but little secondary change.
a, a parenchyma cell from cortex;
b, cell of endodermis;
c, pericambium;
d, outer end of xylem ray;
e, phloem;
f,f, meristem forming between xylem ray and phloem.

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