(100 diam.) A, Stone cells. B, Fragments of water tubes. C, Parenchyma, cross-section.D, Parenchyma, longitudinal section. E, Starch.
This image is from Aconitum in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.

(100 diam.) A, Stone cells. B, Fragments of water tubes. C, Parenchyma, cross-section.D, Parenchyma, longitudinal section. E, Starch.
This image is from Aconitum in Sayre's Manual of Organic Materia Medica and Pharmacognosy, 1917.