PLATE 32 



Porous and Striated Stone Cells 



1. Ruellia root {Ruellia ciliosa, Pursh.). 



2. Winter's-bark (Drimys winteri, For St.). 



3. Bitterroot (Apocynum androscemifolium, L.). 



4. Allspice (Pimenta officinalis, LindL). 



5. Aconite (Aconitum napellus, L.). 



