IIU.V 



111 



of coin|Miunil ^raiii.-. than in cither parent; irregularity 

 i- iiittTine.li.it.-: and. on the whole, the resembUnces 

 are ili.-tinctly eloM-r to /. peniea var. purpurea. The 

 hilum in i harm t.-r is closer to /. peniea var. purpurea, 

 hut in .-I-, cntr . r to /. sirnljarrn.fi*. The lamella* 



in ch.ir.n I.T ami nuiuher are closer to /. peniea var. 

 purjiurta. T: :< closer to /. sindjarensi* I:, 



the |>olariscopic and selenite reactions the relationship )g 

 closer to /. peniea var. purpurea, but in the qualitative 

 i. "line reactions closer to /. rindjarentu. In the quali- 

 tative reactions with the chemical reagents the le;i 

 to one IT the other parent are numerous and marked, 

 : the whole mm h more to 7. peniea var. purpurea 

 than to tin- other parent; moreover, a feature that is 

 characteristic of om- (parent may be accentuated in the 

 hyhnd. th IMMUJJ noted especiallv in the reactions with 

 sodium liMlroxiili- and sodium saficylate. 



* intrntttHt KffrtMtd by l.igkt. Color, mnd Temper*- 



tun ~ 



Polarisation: 



I. per v. pur., moderately hich to very Ugh. rmlu 70. 

 I. aindjarenale. moderately h%h to very bich. hihf than in I. 



peniea var. purpurea. value 76. 

 I. puraind. moderately hicb to hich. lower than in either parent. 



value 06. 

 Iodine: 



I i~r. v. pur., moderate, value 66. 



1. Mudjaroaie. moderate. lee than in I. peniea var. purpurea. 



value 60. 

 1 i-unind. moderate, the eame a* in I. aindjarenaU. value 60. 



in violet: 



I. per. v. pur., moderate, value 46. 

 I. aindjarenefe. moderate, leai than in I. peniea var. purpurea. 



value 43. 



rwid, light to moderate, leei than in either parent, value 40. 

 tiafranin: 



1 |wr. v. pur., moderate, value 60. 



I. nndjarenaia. moderate, laaa than in I. peniea var. purpurea. 



value 47. 



I. puraiod. moderate, leae than in either parent, value 46. 

 Temperature: 



1. per. v. pur., in the majority at 4 to 06*. in all at 08 to 70*. 



mean 00*. 

 I undjarenan. in the majority at 03.5 to 65*. in all at 00 to 07*. 



meanOO.6*. 



I. puraind. in the majority at 64.6 to 00. in all at 08 to 70, mean 

 00*. 



The reactivity of /. peniea var. purpurea is higher 

 than tint of the other parent in the iodine, gentian violet, 

 and saf ranin reactions, and lower in the polarization and 

 t- ni|terature reactions. The reactivity of the hybrid 

 is the same or practically the same as that of /. peniea 

 var. purpurea in the temperature reaction; the same 

 or practically the same as that of /. tindjaretuit in the 

 iodine reaction ; and the lowest of the three in the polar- 

 ization, gentian violet, and safrauin reactions. The hy- 

 brid is closer to /. peniea var. purpurea than to the 



- parent in the polarization and temperature reac- 

 : and the reverse in the iodine, gentian violet, and 

 saf ran in reactions. 



Table A 33 shows the reaction-intensities in percent- 

 ages of total starch gelatinized at definite intervals 

 (minutes). 



VELOCITY-REACTION CURVES. 



This section treats of the velocity-reaction curves of 

 the starches of 7rw peniea var. purpurea, I. tindjarentis, 

 aud /. punind. showing the quantitative difference* in 

 the behavior toward different reagenta at different time- 

 interval*. ( Charts D 442 to D 4 68. ) 



The most conspicuous features of this group of curves 

 are: 



( 1 ) The marked closeness of all three curves 

 throughout the various reactions, the only reaction in 

 which there is a marked tendency to continually in- 

 creasing differentiation during the 60 minutes being 



