PLATE 93 



POWDERED SPIGELIA MARYLANDICA, L. 



I. Epidermis and cortical parenchyma. 2. Tracheids and fibres. 3. Par- 

 enchyma cells of the root containing the small starch grains, longitudinal view. 

 4. Parenchyma of the rhizome containing the large starch grains, transverse 

 view. 5. Tracheids. 6. Surface view of the epidermal cells. 7. Starch scattered 

 through the field. 8 and 8'. Dark masses of epidermal and underlying tissue. 



