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A TEXT-BOOK OF BOTAXY. 



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

 chyma of the bark of the horse-chestnut (^Esculus Hippocasiamim); 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 sinensts; 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 aurantium; G, 

 a to c, rectangular crystals from a Brazilian bignonia. After Dippel in "Das Mikroskop." 



