706 



STARCHES OF IRIDACE^. 



Differentiation of the Starches of the Genus /ns. Continued. 



PoLAMSCOPic Properties. Continued. 

 Degree of Polarization. 



I. florenlina: Fair. 



/. pallida var. speciosa: Fair to high, higher than in 



/. florenlina. 

 I. pumila var. cyanea: High, distinctly higher than in 



/. florenlina. 

 I. bismarckiana: Fair to fairly high, slightly higher than 



in /. florenlina. 

 I. iberica: Fairly high, more than in I. florenlina. 

 I. xiphium var. Grand Tresorier: Rather high to quite 



high, distinctly higher than in /. florenlina. 

 I. xiphium var. Wilhelmine: High to quite high, dis- 

 tinctly higher than in /. florenlina. 

 I. xiphium var. lusilanica: Rather high to quite high, 



distinctly higher than in /. florenlina. 

 I. tingilana: High to very high, decidedly higher than 



in /. florenlina. 

 I. reliculala: High to very high, decidedly higher than 



in /. florenlina. 

 I. hislrio: High to very high, decidedly higher than in 



I. florenlina. 

 I. alala: High to very high, decidedly higher than in 



/. florenlina. 

 I. caucasica: High to very high, decidedly higher than 



in /. florenlina. 



Polarizalion wilh Selenite Quadranls and Colors. 



I. florenlina: Quadrants fairly well defined, generally 



irregular, unequal in size. Colors generally pure. 

 /. pallida var. speciosa: Quadrants essentially the same 



as in /. florenlina, but not quite so irregular or 



unequal. Colors more often pure than in /. 



florenlina. 

 I. pumila var. cyanea: Quadrants essentially the same 



as in I . florenlina, except more irregularity. Colors 



generally pure. 

 /. bismarckiana: Quadrants and colors essentially the 



same as in /. florenlina. 

 I. iberica: Quadrants and colors essentially the same as 



in I. florenlina. 

 I. xiphium var. Grand Tresorier: Quadrants and colors 



essentially the same as in /. florenlina. 

 I. xiphium var. Wilhelmine: Quadrants and colors 



essentially the same as in /. florenlina. 

 I. xiphium var. lusilanica: Quadrants and colors essentially 



the same as in /. florenlina. 

 I. lingilana: Quadrants and colors essentially the same 



as in /. florenlina. 

 I. reliculala: Quadrants and colors essentially the same 



as in /. florenlina. 

 I. hislrio: Quadrants and colors essentially the same as 



in /. florenlina. 

 I. uhila: Quadrants and colors essentially the same as in 



/. florenlina. 

 I. caucasica: Quadrants and colors essentially the same 



as in /. florenlina. 



Iodine Reaction8. 



Intensily and Color. 



I. florenlina: Fairly deep; violet. 



/. pallida var. speciosa: Fairly deep, less than in /. 



florenlina; violet. 

 /. pumila var. cyanea: Fairly deep, the same as in /. 



florenlina; violet. 

 /. bismarckiana: Fairly deep, the same as in I. florenlina; 



violet. 

 /. iberica: Fairly deep, less than in /. florenlina; violet. 

 /. xiphium var. Grand Tresorier: Fairly deep, slightly 



more than in /. florenlina; blue-violet. 

 /. xiphium var. Wilhelmine: Fairly deep, more than in 



/. florenlina; blue-violet. 



Iodine Reactions. Continued. 



Inlensily and Color. Continued. 

 /. xiphium var. lusilanica: Fairly deep, the same as in 



/. florenlina; blue-violet. 

 /. tingilana: Fairly deep, the same as in /. florenlina; 



\dolet-blue. 

 /. reliculala: Deep, more than in/. ^orereJfna; violet-blue. 

 /. hislrio: Fairly deep, slightly more than in /. florenlina; 



violet-blue. 

 /. alala: Deep, more than in /. florenlina; indigo-blue. 

 /. caucasica: Deep, more than in /. florenlina; indigo- 

 blue. 



Staining Reactions. 

 Wilh Genlian Violet 

 I. florenlina: Light. 



7. pallida var. speciosa: Light, less than in I. florenlina. 

 I. pumila var. cyanea: Light, the same as in I . florenlina. 

 I. bismarckiana: Light, the same as in /. florenlina. 

 I. iberica: Light, slightly more than in 7. florenlina. 

 I. xiphium var. Grand Tresorier: Light, more than in 



7. florenlina. 

 I. xiphium var. Wilhelmine: Light, more than in 7. 



florenlina. 

 I. xiphium var. lusilanica: Light, more than in 7. 



florenlina. 

 I. lingilana: Light, slightly more than in 7. florenlina. 

 I. relieidala: Fair, more than in 7. florenlina. 

 I. hislrio: Light, more than in 7. florenlina. 

 I. alala: Fair, distinctly more than in 7. florenlina. 

 I, caucasica: Fair, distinctly more than in 7. florenlina. 



Wilh Safranin. 

 I. florenlina: Light. 



7. pallida var. speciosa: Light, less than in 7. florenlina. 

 I. pumila var. cyanea: Light, the same as in 7. florenlina. 

 I. bismarckiana: Light, the same as in 7. florenlina. 

 I. iberica: Light, but slightly more than in 7. florenlina. 

 I. xiphium var. Grand Tresorier: Fair, distinctly more 



than in 7. florenlina. 

 I. xiphium var. Wilhelmine: Fair, distinctly more than 



in 7. florenlina. 

 I. xiphium var. lusilanica: Fair, distinctly more than in 



7. florenlina. 

 I. tingilana: Light, more than in 7. florenlina. 

 I. reticulata: Fair, distinctly more than in 7. florenlina. 

 I. histrio: Light, sUghtly more than in 7. florenlina. 

 I. alala: Fair, distinctly more than in 7. florentvia. 

 I. caucasica: Fair, distinctly more than in 7. florenlina. 



Temperature of Gelatinization. 

 7. florenlina: 71 to 72 C, mean 7L5. 

 I. pallida var. speciosa: 74 to 75 C, mean 74.5. 

 7. pumila var. cyanea: 72.5 to 74 C, mean 73.25. 

 7. bismarckiana: 71 to 73 C, mean 72. 

 7. ibenca: 72.2 to 74 C, mean 73.1. 

 7. xiphium var. Grand Tresorier: 65 to 60 C, mean 65.5. 

 7. xiphium var. Wilhelmine: 60 to 67 C, mean 06.5. 

 7. xiphium var. lusilanica: 66.5 to 67.5 C, mean 67. 

 7. lingilana: 65 to 66 C, mean 65.5. 

 7. reticulata: 64.5 to 66 C, mean 65.25. 

 7. hislrio: 65 to 06 C, mean 65.5. 

 I. alala: 66 to 67 C, mean 66.5. 

 7. caucasica: 64 to 65 C, mean 64.5. 



Effects of Various Reagents. 



Reaction with Chloral Hydrate-Iodine. 



I. florenlina: Begins in all in 30 seconds; complete in 



all in 5 minutes. 

 I. pallida var. speciosa: Begins in a few in 30 seconds; 



complete in practically all in 15 minutes. 

 7. pumila var. cyanea: Begins in a few in 30 seconds; 



complete in practically all in 15 minutes. 

 I. bismarckiana: Begins in a few in 30 seconds; complete 



in all in 5 minutes. 



