184 



A TEXT-BOOK OF BOTANY. 



A D 



FIG. 105. Monoclinic crystals of calcium oxalate: A, a to f, crystals from the paren- 

 chyma of the bark of the horse-chestnut (/Esculus Hippocastanum); B, a to c, from the pith 

 of Periploca graca; C, a to e, from the parenchyma in the region of the fibrovascular bundles 

 in Musa sinensis; D, a to c, from the petioles of the pinnate leaves of Cycas revoluta; E, a to 

 c, crystals from the bark of the guaiac tree; F, a single crystal from Citrus Auran- 

 tinm; G. a to c. rectangular crystals from a Brazilian Bignonia. After Dippel in 

 "Das Mikroskop. 



