SIMPLE POWDERED VEGETABLE DRUGS 129 



Parenchyma cells much distorted. . . . Inula 



Parenchyma cells not irregular Lappa 



.... Inub'n wanting 



Ducts or tracheids quite numerous 



Parenchyma cells large. Ducts reticulate 



Red cell contents Iris versicolor 



. . No red cell contents Gentiana 



Parenchyma cells medium in size 



, Cystoliths present (Sclerenchyma) Ruellia 



No cystoliths. (No sclerenchyma) Spigelia 



Ducts or tracheids few 



Numerous prismatic crystals Limonis and Citrus 



Numerous acicular crystals Scilla 



No crystals. Red oil globules Capsicum 



. . . Starch present 



Simple starch 



Crystals present 



Very large crystals, prismatic Iris florentina 



. . . '. Raphides Convallaria 



Aggregate, quite large, numerous , Geranium 



Crystals wanting 



Starch pasty. Yellow color Curcuma 



Starch not pasty 



Parenchyma cells thick-walled= Oil (seed) Colchicum 



. . Parenchyma cells not thick-walled 



Ducts scalariform. Yellow resin Male fern 



Ducts reticulate 



Starch granules large 



Yellow resin. Starch abundant Zingiber 



No yellow resin. Starch sparing Sumbul 



Starch granules small to medium 



Parenchyma spongy Calamus 



Parenchyma not spongy. Red color Sanguinaria 



Ducts porous, or tracheids 



Large porous ducta Apocynum 



Ducts or tracheids medium 



.' Parenchyma cells porous Serpentaria 



Parenchyma cells not porous 



Red cell contents Leptandra 



No red cell contents Cimicifuga 



Starch granules compound 



Crystals of calcium oxalate present 



Micro-crystalline (root) Belladonna 



Aggregate crystals, large .' Rheum 



Raphides Ipecac 



No crystals present 



Ducts very large, reticulate Bryonia 



Ducts or tracheids medium, some spiral ducts 



Starch plentiful, no aggregates 



Resin cells present Asarum 



9 



