Fig. 7.—Longitudinal section through the midrib

a, ducts of the vasal bundle, showing spirals;
b, adjoining phloem tissue in longitudinal section;
c, ends of ducts as seen when focus is slightly changed.

This image is from Eriodictyon Glutinosum in the November issue of the American Journal of Pharmacy, 1895.

Fig. 7.—Longitudinal section through the midrib