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FIGURE 1. 
Figure 1. Complete cross section of the rhizome of Hydrastis canadensis._(Magnified 
20 diameters, and reduced 14%. For reference to parts, see Fig. 4.) 
Figure 2. Cross section of the root of Hydrastis canadensis.—a, outer row of cells; 6, 
parenchyma of the root; ¢, row of cells bordering the woody bundle; d, reticulated cells; e, 
central woody parenchyma; f/, wood prosenchyma; m, root hair; (magnified 75 diameters 
and reduced 4.) / 3 
Figure3. Longitudinal section of the root.—a, outer row of epidermal-like cells; 6, par- 
enchyma; c, border‘cells of the woody bundle; d, reticulated cells; e, wood parenchyma; /, ing 
wood prosenchyma, (Magnified 75 diameters, and reduced '4.) 1 Be iy 
Figure 4. Cross section of the rhizome.—a, cork cells; 6, green iayer of the bark ; ¢, liber 
jayer of the bark; d, cells of the newly-formed cambium; e, medullary rays; m, woody bundle ~ Pic 
with prosenchyma, parenchyma and reticulated cells;,g, pith. (Magnified 75 diameters, and 
reduced 14.) oh 
