126 POWDERED VEGETABLE DRUGS 



Trichomes shorter Marjoram 



Non-glandular trichonies not warty 



Micro-crystalline calcium oxalate 



Glandular trichomes long stalked Tabacum 



Glandular trichomes short stalked Belladonna 



Micro-crystalline calcium oxalate wanting 



Trichomes very numerous Digitalis 



Trichomes fewer, large Hyoscyamus 



Trichomes long, slender, twisted. Marrubium 



. . Epidermal elements wanting 

 .... Sclerenchyma cells present 



Bast present 



With acicular crystals (raphides) 



Compound starch granules Sarsaparilla 



Simple starch granules 



Large brown bast cells Chainaelirium 



Bast fibers medium Hydrangea 



Raphides wanting 



Bast cells large, comparatively short 



Sclerenchyma cells few Cinchona 



Sclerenchyma cells numerous 



Starch quite abundant Cassia cinnamon 



Starch sparingly present Ceylon cinnamon 



Bast cells lined with prismatic crystals Quebracho 



Bast cells not lined with crystals 



Mucilage bearing cells Sassafras 



Mucilage bearing cells wanting Berberis 



Bast cells not greatly thickened 



Scalariform ducts. Large compound starch Methysticum 



Ducts wanting 



Sclerenchyma cells unequally thickened Cascarilla 



Sclerenchyma or bast branching 



Bast plentiful Prunus virginiana'and Viburnum op. 



Bast fibers few . . Viburnum prunifolium and Prunus serotina 



Sclerenchyma typical 



Crystal bearing fibers abundant 



Sclerenchyma cells in groups 



Collenchymatous parenchyma Rhamnus pursh. 



No Collenchymatous parenchyma 



Large wax or resin cells Xanthoxylum 



No wax or resin cells (bark) Myrica 



Sclerenchyma cells mostly singly 



Bast plentiful Populus 



Bast sparingly present 



Large simple starch granules Menispermum 



' Starch wanting (bark) Punica 



Crystal bearing fibers wanting Condurango 



Bast wanting or sparingly present 



Starch plentiful 



Pasty 



