POWDERED DRUGS AND FOODS. 707 



POWDERS OF A BROWNISH COLOR. 



I. Fibrovascular Tissue present. 



A. Containing starch. 



a. Calcium oxalate crystals present. 

 a. In rosette aggregates. 



1. With sclerenchymatous fibers. 



* Containing oil, resin or tannin masses. 



Sclerenchymatous fibers few. 



103. Belladonnse Radix 

 Starch grains 4 to 20 m. . . 104. Gossypii Cortex 

 Starch grains 3 to 7 m, compound. .105. Rubus 



Crystals 10 to 35 /t 106. Juglans 



Crystals 35 to 70 /"■.... 107. Aralia Nudicaulis 



Starch grains 15 to 30 M 108. Stillingia 



Modified bast fibers 109. Euonymus 



Red with alkalies no. Rumex 



Fibers few iioa. Canella 



** No resin or tannin masses. 



Crystals about 25 i^ in. Althaea 



2. Sclerenchymatous fibers wanting. 



* Containing tannin. 



t With oil-secretion reservoirs. 



Starch grains ellipsoidal. 1 12. Fruit of Clove 

 Reddishbrown tannin masses. 113. Pimenta 

 tt Oil-secretion reservoirs wanting. 



Light-brown tannin masses 114. Galla 



Calcium oxalate 45 to 70 /".ilS. Geranium 

 Calcium oxalate 50 to loo i«. . .116. Rheum 

 ** Without tannin. 



Cryptocrystalline crystals. 



i'i7. Belladonnse Radix 

 ;8 Crystals in monocUnic prisms and pyramids. 



Crystal fibers 118. Frangula 



Sclerenchymatous fibers characteristic. .. 119. Krameria 

 Crystal fibers and stone cells.. 120. Rhamnus Purshiana 



Crystals in stone cells 121. Juniperus 



7 Crystal fibers present. 



I. Sclerenchymatous fibers strongly lignified. 



* Colored reddish with alkalies. 



Without stone cells 122. Frangula 



With stone cells 123. Rhamnus Purshiana 



