718 SCIENTIFIC AND APPLIED PHARMACOGNOSY 



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. Belladonnas Radix 



Starch grains 4 to 20 n 104. Gossypii Cortex 



Starch grains 3 to 7 /u, compound 105. Rubus 



Crystals 10 to 35 M 106. Juglaas 



Crystals 35 to 70 n 107. Aralia Nudicaulis 



Starch grains 15 to 30 M 108. Stillingia 



Modified bast fibers 109. Euonymus 



Red with alkalies 110. Rumex 



Fibers few HOa. Canella 



** No resin or tannin masses. 



Crystals about 25 n 111. Althaea 



2. Sclerenchymatous fibers wanting. 



* Containing tannin. 



t With oil-secretion reservoirs. 



Starch grains ellipsoidal. ... 112. Fruit of Clove 

 Reddish brown tannin masses. . .113. Pimenta 



ft Oil-secretion reservoirs wanting. 



Light-brown tannin masses 114. Galla 



Calcium oxalate 45 to 70 n 115. Geranium 



Calcium oxalate 50 to 100 /x 116. Rheum 



** Without tannin. 



Sphenoidal micro-crystals. . .117. Belladonnae Radix 



/3 Crystals in monoclinic 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. 



1. Sclerenchymatous fibers strongly lignified. 



* Colored reddish with alkalies. 



Without stone cells 122. Frangula 



With stone cells 123. Rhamnus Purshiana 



