GENUS STROMANTHE. 



839 



or a Calathea starch. In tlioir reactions these genera, while exhibiting the same typo of reaction- 

 curve, fliffer so tliat one is loadily distinguishal)lo from tlie other. Comparing Maranta with 

 Calathea, it will Ix' found tliat witii the exception of tiie gentian violet reaction, tlie reaction-curve 

 throughout is liigher; and when compared with the curve of Slromanthe it is throughout distinctly 

 iiiglier. Calathea shows higher reactivity, except in the chromic acid, pyrogallic acid, ferric chloride, 

 and Purdy solution. Tlie differences brought out in the reactions are in accord with the generic 

 classification of the botanist, except in the case of M. musaica, which, according to the peculiarities 

 of the starch, is probably a Calathea. 



Chart No. 356. 



CI CA P> FC P o CI PA CA 

 ^ ' PC PS 



Chart No. 358. 



P I GV T P 

 3 



35 



30 



Composite Curve of Mean Reaction-Intensities of Starch 

 of Maranta. 



Composite Curve of Mean Reaction-Intensities of Starch 

 of Calathea. 



Curve of Reaction-Intensities of Starch of Stromanthe 



55 



