\.u;< [SSUS. 



79 



to one parent and then to the other with chromic 

 and pj rogallic acid, the parental relationshi 

 reversed Ln these two reactions. 



I ., i _\ii earl} period of re istam e followed '>;. 8 com 

 parativelj rapid reaction is seen in the reactions with 

 chromic acid and pj rogallic ai id inalltl ties in 



,ii,l in the two starches in the second. 



(6) The earliest period ai which the three curves arc 

 best separated for differential purposes is in the sul 

 phuric-acid reaction within the 5-minute period; in thai 

 with pyrogallic arid at 1*1 minutes; ami in that with 

 chloral hydrate at 60 minutes. 



RE \< CION-INTENSITIES OF Till: II VISKIO. 



This sr.t imi deals with the reaction-intensities of thi 

 hybrid as regards sameness, intermediateness, excess, 

 and deficit in relation to the parents. (Table A 17 and 

 Charts D299 toD3(M.) 



The reactivities of the hybrid are the same as thosi 

 of the seed parent in the reactions with gentian violet and 

 chromic acid; the same as those of the pollen parent in 

 those with polarization, iodine, and safranin; the same 

 as those of both parents in none; intermediate in none: 

 highest in those with chloral hydrate, nitric and. and 

 sulphuric acid, in all three being closer to the ?eed parent ; 

 and lowest in those with temperature and pyrogallic a id, 

 in both being closer to the seed parent. 



The following is a summary of the reaction-intensi- 

 ties (10 reactions): Same as seed parent, "? ; same a- 

 pollen parent. :i : same as both parents, 0; intermediate. 

 0; highest, 3; lowest, 2. 



The seed parent, .V. princess mary, has from these 

 data exercised a far more potent influence than .V. poeti 

 cus poetarum on the properties of the starch of th 

 hybrid. 



Composite Curves of the Reaction-intensities. 

 This section treats of the composite curves of the ro 

 tion-intensities, showing the differentiation _ of thi 

 starches of Narcissus princess mary, N. poeticus poe- 

 tarum. and N. cresset. (Chart E 17.) 



The most conspicuous features of this chart are: 



(1) The very close correspondence in the curves, 

 both as to nearness and course. 



(2) In N. princess mary in comparison with the 

 other parent the higher reactions with gentian violet, 

 chromic acid, and nitric acid: the lower reactions with 

 polarization and in, line: and the same or practically tie 

 same reactions with chloral hydrate, pyrogallic acid, and 

 sulphuric acid. 



(:i) In .V. princess mary the very high sulphuric- 

 acid reaction; the absence of any high reaction; the 

 moderate reactions with iodine, safranin, chromic acid 

 and pyrogallic acid: the low reactions with polarization, 

 gentian violet, temperature, and nitric acid ; and the very 

 low reaction with chloral hydrate. 



(4) In N. poeticus poetarum the very high reaction 

 with sulphuric acid : the absence of any high reaction ; the 

 moderate reactions with polarization, iodine, safranin. 

 temperature, and pyrogallic acid: the low reaction- with 

 gentian violet, chromic acid, and nitric acid ; and the very 

 low reaction with chloral hydrate. 



(5) In the hybrid the verv hieh reaction with sul- 

 phuric acid : the absence of any high reaction; the mod- 



erate rea< tions with polarization, anin, and 



die ai el : the low reactions v. an riolet, tem- 



pi rature, pj rogallii I v '''7 



low reaction with chloral hydrate. 



d lie following is a summary of the reaction-inb 



1 1, i in i, actio 



N. princi i 



N en '' 



high 



Hint,. 







low. 



1 v Comparisons of the Si*, h Narcis 



ABSCISSUS, X. POETIC1 S POETARUM, AND X. WILL 

 SCARLET. 



In In tologic chara opic figures, 



n ai i ions h itb seleniti . n ai I ioi rid quali- 



tative reactions with the various chemical reagents the 

 starches of the parent- and hybrid exhibit properties in 

 common in varying degrees of development, which collec- 

 tively in each case aiv distil ' igh all three 

 starches are rery much alike. In histologic propei 

 the starches of the parents differ very little, and the 

 same is also true of the polariscopic figures and reai I 

 with selenite. In the iodine reactions do qualitative dif- 

 ferences w,re recorded. In the qualitative reactions with 

 chloral hydrate, chromic acid, pyrogallic acid, nitric acid, 

 and .sulphuric acid there are properties in commoi 

 also individualities. The standi of the hybrid in i 

 parison with the starches of the pare I 

 relationship to Narcissus abscissus in the form of the 

 grains, the character of the hilum, the character of the 

 lamellae, and the size of the larger grains; hut closer to 

 the other parent in the size of the .-mailer grains. The 

 eccentricity of the hilum is about the same in all three 

 starche . and m the hybrid the lamellae are mon 

 than in the parents, and the hilum i eeply and 

 extensively fissured. In the polarization figures and 

 reactions with selenite the relationship is closer to .Y. 

 abscissus. In the qualitative iodine reaction- it is closer 

 to N. poeticus poetarum. In all i ■ alitative reac- 

 with the chemical n agents peculiarities of both 

 parents are obser ed, but the n sembl na are, on tie- 

 whole, closer to N. abscissus. Such differences as have 

 been recorded are only of a minor character. 



Reaction-intensities Expressed by Light, Cola-. pera- 



ture Reactions. 

 Polarization: 



N. abscissus, low to high, value 43. 



\- poeticus poetai , low to high, somewhat less than in N. abs, 



v:i! 10. 



X. will scarlet, Ion to high, the ; v . value 43. 



Iodine: 



N. abscissus, light to moderate, value 40. 



X, poeticus poetar., light to moderate, somewhat less than in N. 



abscissus. value 45. 

 N. will scarlet, light to moderate tl - as in N poeticus 

 arum, va' 

 Gentian < iolet : 



X, abscissus, light to moderate, value 33. 



X.,,,., tar., light to moderate, Bomewhal more than in 



\. aliseissus, value 35. 

 N. will scarlet, light to moderate, higher than in either t.arcnt, 

 value 37. 



