NAHCISsrs. 



89 



deficit in relation to the parents. (Tables A 23 and 

 Charts D 335 toD3 



The reactivities of the hybrid arc the same as those 

 of the seed parenl in the reai tions with polarization, io- 

 dine, gentian violet, and sulphuric acid; the same as 

 those of the pollen parenl in none; the same as those 

 of both parents in the safranin reaction; intermediate 

 in those with temperature, chloral hydrate, and pyro- 

 gallic acid, in two loser to those of the pollen 



parent and in one as close to cue as the other pa 

 highest in the nitric-:; tion, and (loser to the 



d parent; and lowest in the chromic-acid reaction, 

 i loser to the seed parent. 



I ie ■ ■ a summary of the reaction-intensi- 



ties i m react ions i : Same as seed parent, 1 ; same as pol- 

 len parent, 0; same as both parents, l ; intermediate, 3; 

 highest, l ; lowest, 1. 



From the foregoing data it seems that the seed 

 parenl exercises a distinctly greater influence than tin- 

 pollen parent on the characters of the starch of the 

 hybrid. The most, marked tendencies in the reactions 

 arc to sameness as the seed parent and to interme- 

 diateness. 



Composite Cubves of Reaction-intensities. 



This section treats of the composite curves of the 

 reaction-intensities, Bhowing the differentiation of the 

 starches of Narcissus leedsii minnie hume, N. trian- 

 drus albus, and X. agues harvey. ((hart E '.'3.) 



The mosi conspicuous features of this chart are: 



(1) The very close correspondence of all three curves 

 in course and closeness throughout the chart, 



('.'i In N. leedsii minnie hume in comparison with 

 the other parent the higher gentian-violet and chloral- 

 hydrate reactions; the lower reactions with polarization, 

 iodine, temperature, chromic acid, pyrogallic, and nitric 

 acid; and the same or practically the same in the reac 

 tions with safranin and sulphuric acid. 



(3) In N. leedsii minnie Inane the very high sul- 

 phuric-acid reaction ; the high iodine reaction; the mod- 

 crate polarization and safranin reactions; the low reac- 

 tions with gentian violet, temperature, chromic acid, 

 pyrogallic acid, and nitric and; the very low reaction 

 with chloral hydrate. 



(4) In .V. triandrus albus the very high sulphuric- 

 acid reaction; the high iodine reaction; the moderate 

 reactions with polarization, safranin, chromic acid, and 

 pyrogallic acid; the low reactions with gentian vi 

 temperature, and nitric acid; and the very low reaction 

 with chloral hydrate. 



I '■) In the hybrid the very high sulphuric-acid r 

 . the high iodine reaction; the moderate polariza- 

 and safranin reactions; the low gentian-violet, tem- 

 perature, chromic-acid, pyrogallic-acid, and nitric-acid 

 reactions; and the very low chloral hydrate reaction. 



The following is a summary of the reaction-intensi- 

 ties (10 reactions) : 



_' 1. < 'mm PABISON8 "l i ■ ■ lR< mis. el N . 



EMPEEOE, \. TEIANDB1 I . AND N. J. T. 



i i POE. 



In histologic charai I 

 reaction with Belenite, n i with iodine and quali- 



iat in- react ions with the vai 

 starch nt- and in br d exhibit pro] 



common in varying degl l col- 



lectiw'h in case of each starch u 

 differences are • er. In I. . ,r "|'~ 



ii A an issus triai with 



the other parent there are more compound grain 

 rates, together with various other peculiar 

 and t trious other differences in hilum, lam 



and size. The polari- -tinct 



hut more often her minor 



differences. With selenite the quadrants are more often 

 clean-cut, the color- [ess often pure, and 

 with a greenish tinge In the qualitative reactions with 

 iodine no i rded. Jn the 



qualitative reaction- with chloral hydrate, chromic acid, 

 pyrogallic acid, nitric acid, and sulphuric acid both 

 methods of gelatinization common to both starches i 

 and also methods observed in .V. triandrus alius that 

 are not seen or seen only in modified form in X. em < 

 The starch of the hybrid contains fewer compound 

 grams and ttes than either parent, and shows, 



on the whole, a closer relationship to A'. ■ than 



to the other parent. In character and eccentricity of 

 the hilum and in size the relationship is I . A'. 



emperor; but in the character of the lamella? closer to 

 N. triandrus albus. in the character of the polariza- 

 tion figure and m the reactions with selenite the relation- 

 ship is closer to A', triandrus albus. In the qualitative 

 reactions with iodine the raw grains are more cl 

 related to those of A', emperor, hut the gelatinized grains 

 show no differences from those of both parent-. In the 

 qualitative reactions with the chemical r< . 

 iliieiiccs of both parent- arc manifest; in the chloral 

 hydrate and sulphuric acid the resemblances are 

 to .V. empt ror, w hi!,- in the chromic acid, p\ rogallic acid, 

 and nitric acid the hybrid is closer to A", triandrus albus. 



Reaction-intensities Expressed by Light, Color, and Tempera- 

 ture Reactions. 

 Polarization: 



X. emperor, low to high, value U0. 



N. triandrua albus, low in high, lower than in X. ei due 50. 



X. j. t. bennett poe. low to high, the same as in X. triandrua nil. us. 

 value 60. 

 Iodine: 



X. emperor, moderate to deep, value CO. 



X. triandrua albus, moderately d er than in X. emperor, 



value 65. 

 N. j. t. bennett poe, moderate to deep, the same as in X. emperor, 

 value 60. 

 Gentian violet: 



X. emperor, moderate, value 45. 



X. triandrus albus, light to moderate, lighter than in X. emperor, 



value 35. 

 N. j. t.bennettpoe, moderate, deeper than in cither parent, value50, 

 Safranin : 



X. emperor, moderate, value 50. 



X. triandrus albus, light to moderate, lighter than in X emperor, 



value 40. 

 X. J. t.bennettpoe, moderate, deeper than in either parent, value 55. 



