900 



STARCHES OF CYCADACBiB, 



NOTES ON THE STARCHES OF CYCADACEiE. (Charts 398 to 400.) 



All the starches of Cycadacece belong to the same type. Those of Cycas and Dioon are so alike 

 in all particulars that differentiation by gross histological characteristics seems impossible, but 

 the stajch of Zamia may readily be distinguished from those of Cycas and Dioon by|[the marked 

 difference in size. By means of their reactions each genus can positively be differentiated one from 

 the others, Cycas and Dioon being closer than either with Zamia. 



aart No. 399. 



P I GV T P 

 S 



I GV S T 



CI CA PA FC P S CI PA CA 

 POPS 



15 

 20 



Curve oflReaction-Intensitiesof Starch of Cycaa. 



Curve of Reaction- In tensities of Starch of Dioon. 



Curve of Reaction-Intensities of Starch of Zamia. 



