688 



STARCHES OF LILIACEiE. 



Differentiation of Certain Starches of the Genus Muscari. — Continued. 



Poijuuscopic Propebties. 

 Figure. 



M. botryoides: Centric or eccentric, distinct, fairly clear- 

 cut, usually regular. 



M. paradoxum: Centric or eccentric, not clear-cut, usu- 

 ally regular. 



M. micranthum: Centric or eccentric, distinct, fairly clear- 

 cut, regular. 



M. conicum: Centric or eccentric, distinct, fairly clear- 

 cut, usually regular. 



M. comtnutatum: Centric or eccentric, distinct, usually 

 clear-cut, usually regular. 



M . racemosum: Centric or eccentric, distinct, fairly clear- 

 cut, usually regular. 



M. compactum: Centric or eccentric, distinct, fairly clear- 

 cut, usually regular. 



M. comosum: Centric or eccentric, distinct, not clear-cut, 

 usually regular. 



Degree of Polarization. 



M. botryoides: High. 



M. paradoxum: High, variable, not so high as in M. 

 botryoides. 



M. micranlhum: High, somewhat variable, not so high as 

 in M. botryoides. 



M. conicum: High, slightly higher than in M. botry- 

 oides. 



M. commulaium: High, somewhat variable, not so high 

 as in M. botryoides. 



M. racemosum: High, slightly higher than in M. botry- 

 oides. 



M. compactum: High, not quite so high as in M. botry- 

 oides. 



M. comosum: High, variable, as a whole, not so high as 

 in M. botryoides. 



Polarization with Selenite—Qttadrants and Colors. 



M. botryoides: Quadrants fairly well defined, regular in 

 shape. Colors pure. 



M. paradoxum: Quadrants fairly well defined, regular. 

 Colors often pure. 



M. micranthum: Quadrants fairly well defined, quite regu- 

 lar. Colors pure. 



M. conicum: Quadrants fairly well defined, frequently 

 irregular. Colors usually pure. 



M. commuiatum: Quadrants fairly well defined, regular 

 in shape. Colors pure. 



M. racemosum: Quadrants fairly well defined, usually 

 regular. Colors p»u«. 



M. compactum: Quadrants fairly well defined, usually 

 regular. Colors pure. 



M. comosum: Quadrants fairly well defined, often irregu- 

 lar. Colors mostly impure. 



Iodine Reactions. 

 Intensity and Color. 



M. botryoides: Deep; blue-violet. 



M. paradoxum: Deep, not so deep as in M. botryoides; 

 blue-violet. 



M. micranthum: Deep, same as in M. paradoxum; blue- 

 violet. 



M. conicum: Deep, same as in M. paradoxum; blue- 

 violet. 



M. commuiatum: Deep, same as in M. paradoxum; blue- 

 violet. 



M. racemosum: Deep, same as in M. paradoxum; blue- 

 violet. 



M. compactum: Deep, same as in M. paradoxum; blue- 

 violet. 



M. comosum: Deep, same as in M. paradoxum; blue- 

 violet. 



Staining Reactions. 

 With Gentian Violet. 



M. botryoides: Deep. 



M. paradoxum: Deep, slightly deeper than in M. botry- 

 oides. 



M. micranlhum: Deep, deeper than in M. botryoides. 



M. conicum: Deep, deeper than in M. botryoides. 



M. commuiatum: Fair, much less deep than in M. botry- 

 oides. 



M. racemosum: Deep, not quite so deep aa in M. botry- 

 oides. 



M. compactum: Deep, slightly deeper than in M. botry- 

 oides. 



M. comosum: Deep, deeper than in M. botryoides. 



With Safranin. 



M. botryoides: Fairly deep. 



M. paradoxum: Fairly deep, deeper than in M. botryoides. 

 M. micranthum: Fairly deep, the same as in M. botryoides. 

 M. conicum: Fairly deep, deeper than in M. botryoides. 

 M. commuiatum: Fair, less deep than in M. botryoides. 

 M. racemosum: Fairly deep, not quite so deep as in M. 



botryoides. 

 M. compactum: Deep, deeper than in M. botryoides. 

 M. comosum: Fairly deep, slightly deeper than in M. 



botryoides. 



Temperature of Gelatinization. 



M. botryoides: 70 to 72° C, mean 71°. 

 M. paradoxum: 72 to 74° C., mean 73°. 

 M. micranlhum: 68.5 to 70° C, mean 69.25°. 

 M. conicum: 72 to 74° C, mean 73°. 

 M. commulaium: 71 to 73° C, mean 72°. 

 M. racemosum: 74.5 to 75° C, mean 74.75°. 

 M. compactum: 69 to 71° C, mean 69°. 

 M. comosum: 67 to 69° C, mean 68°. 



Effects of Various Reagents. 



Reaction with Chloral Hydrate-Iodine. 



M. botryoides: Begins in most in 45 seconds; complete in 



20 minutes. 

 M. paradoxum: Begins in half in 45 seconds; complete 



in four-fifths in 40 minutes. 

 M. micranthum: Begins in many in 30 seconds; complete 



in 20 minutes. 

 M. conicum: Begins in all in 30 seconds; complete in 



three-fourths in 48 minutes. 

 M. commuiatum: Begins in many in 60 seconds; com- 

 plete in nearly all in 17 mmutes, and in all in 30 



minutes. 

 M. racemosum: Begins in most in 30 seconds; complete 



in nearly all in 30 minutes, all in 50 minutes. 

 M. compactum: Begins in most in 30 seconds; complete 



in 30 minutes. 

 M. comosum: Begins in most in 60 seconds; complete in 



all in 30 minutes. 



Reaction unth Chromic Acid. 

 M. botryoides: Begins in 15 seconds; complete in 3}^ 



minutes. 

 M. paradoxum: Begins in 30 seconds; complete in 4 



minutes. 

 M. micranthum: Begins in a few seconds; complete in 1 % 



minutes. 

 M. conicum: Begins in 15 seconds; complete in 3H 



minutes. 

 M. commuiatum: Begins in 15 seconds; complete in 2 



minutes. 

 M. racemosum: Begins in 30 seconds; complete in 3 



minutes. 

 M. compactum: Begins in 30 seconds; complete in 2J^ 



minutes. 

 M. comosum: Begins in 30 seconds; complete in 3 minutes. 



