830 



STAKCHE8 OP MARANTACE^. 



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



PoLABiscopic Pbopertibs. — Continued. 

 Degree oj Polarization. — Continued. 



M. letuxmeura: High, slightly lower than but of same 



variability as in M. arundinacea. 

 M. musaica: High, but not so high as in M. arundinacea, 



variation greater than in M. arundinacea. 



Polaiitalion tmth Selenite — QtiadranU and Colors. 



M. arundinacea: Quadrants clearly defined, clear-cut, 

 sometimes irregular in shape, and usually unequal 

 in size. Colors generally pure. 



M. arundinacea var. No. 1: Quadrants well defined, irreg- 

 ular in shape, and unequal in size. Colors generally 

 pure. 



M . arundinacea var. No. S: Quadrants very well defined, 

 irregular in shape, and imequal in size. Colors gen- 

 eraUy pure. 



M. massangeana: Quadrants clearly defined, clear-cut, 

 commonly slightly irregular in shape and unequal 

 in size. Colors genertdly pure, slightly less pure 

 than in M. arundinacea. 



M. leuconeura: Quadrants distinct, clear-cut, generally 

 regular in shape and unequal in size. Colors 

 generally pure. 



M. musaica: Quadrants generalljr well defined, fairly 

 clear-cut, usually irregular in shape and unequal 

 in size. Colors generally pure, more often purer 

 than in M. arundinacea. 



Iodine Reactions. 



Intensity and Colors. 



M. arundinacea: Fairly deep: blue-violet. 



M. arundinacea var. No. 1: Fairly deep, a little deeper 

 than in M. arundinacea; blue-vioiet. 



M. arundinacea var. No. S: Fairly deep, the same as in 

 M. arundinacea; blue-violet; more blue than in 

 M. arundinacea. 



M. massangeana: Fairly deep, deeper than in M. arundi- 

 nacea; blue-violet to a reddish-violet. 



M. leuconeura: Deep, deeper than in M. arundinacea; 

 dull blue to a reddish-violet. 



M. musaica: Fairly deep, less than in M. arundinacea; 

 reddish to a blue-violet. 



Staining Reactions. 



With Gentian Violet. 



M. arundinacea: Fair. 



M. arundinacea var. No. 1: Fair, little deeper than in 



M. arundinacea. 

 M. arundinacea var. No. 2: Fair, slightly deeper than in 



M. arundinacea. 

 M. massangeana: Light, lighter than in M. arundinacea. 

 M. leuconeura: Very li^t, distinctly lighter than in M. 



arundinacea. 

 M. mttsaica: Light, lighter than in M. arundinacea. 



With Safranin. 

 M. arundinacea: Fairly deep. 

 M. arundinacea var. No. 1: Fairly deep, slightly deeper 



than in M. arundinacea. 

 M. arundinacea var. No. S: Fairly deep, sUghtly deeper 



than in M. arundinacea. 

 M. massangeana: Fair, lifter than in M. arundinacea, 

 M. leuconeura: Light, distinctly lighter than in M, arunr 



dinacea. 

 M. musaica: Fair, lighter than in M. arundinacea. 



Temfebatdbe op Gblatinization. 



M. arundinacea: 76 to 78° C, mean 77°. 



M. arundinacea var. No. 1: 71 to 72° C, mean 7L5°. 



Af. arundinacea var. No. S: 71 to 73° C., mean 72°. 



M. massangeana: 68 to 70° C, mean 69''. 



M. musaica: 88 to 89° C, mean 88.6*. 



Effects of Various Reagents. 

 Reaction with Chloral Hydrate-Iodine. 



M. arundinacea: Begins immediately; complete in prac- 

 tically all in 3 minutes. 



Af. arundinacea var. No. 1: Begins immediately; com- 

 plete in practically all in 3}^ minutes. 



M. arundinacea var. No. 2: Begins immediately; com- 

 plete in practically all in 4}^ minutes. 



M. massangeana: Begins immediately; complete in prac- 

 tically all in 7 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 2 minutes. 



M. musaica: Begins immediately; complete in practically 

 all in 9 minutes. 



Reaction with Chromic Add. 



M. arundinacea: Begins immediately; complete in practi- 

 cally all in 3ji minutes. 



M. arundinaceayai. No. 1 : Begins immediately; complete 

 in practically all in 2 minutes. 



M. arundinaceavax. No. 2: Begins immediately; complete 

 in practically all in IJ^ minutes. 



M. massangeana: Begins immediately; complete in prac- 

 tically all in 3 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 2 minutes. 



M. musaica: Begins immediately; complete in practically 

 all in 8 minutes. 



Reaction with Pyrogallic Acid. 



M. arundinacea: Begins immediately; complete in 45 sec- 

 onds. 



M. arundinacea var. No. 1 : Begins immediately; complete 

 in all in 1 to IJi minutes. 



M. arundinacea var. No. 2: Begins immediately; complete 

 in all in 2 minutes. 



M. massangeana: Begins immediately; complete in all in 

 a minute. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 35 seconds. 



M. musaica: Begins immediately; complete in practically 

 all in 11 minutes. 



Reaction wUh Ferric Chloride. 



M. arundinacea: Begins in a few immediately; complete 

 in practically all in 5 minutes. 



M. arundinacea var. No. 1: Begins in two-thirds in 2 min- 

 utes; complete in practically all in 10 minutes. 



M. arundinacea var. No. 2: Begins in some at once; com- 

 plete in practically all in 15 minutes. 



M. massangeana: Begins immediately; complete in prac- 

 tically all in 15 minutes. 



M. leuconeura: Begins immediately; complete in practi- 

 cally all in 6 minutes. 



M. mu^saica: Begins immediately; complete in about five- 

 sixths in 60 minutes. 



Reaction vrilh Purdy's Solution. 



M. arundinacea: Begins in a few in IJ^ minutes; complete 

 in one-eighth in 60 minutes. 



M. arundinacea\a.r.No.l: Begins immediately; complete 

 in nearly all in 30 minutes; no further progress in an 

 hour. 



Af. arundinacea var. No. 2: Begins in 30 seconds or less; 

 complete in two-thirds in 30 minutes, and in four- 

 fifths in 60 minutes. 



Af. massangeana: Begins in a few in a minute; complete 

 in one-fiftieth in 30 minutes, and in one-tenth in 60 

 minutes. 



M. leuconeura: Begins immediately; complete in one- 

 ninth in 30 minutes with no further reaction in an 

 hour. 



Af . musaica: Begins in a few in a minute; complete in one- 

 thirtieth in 30 minutes, and one-twentieth in an 

 hour. 



