NKIUNE. 



• 



that arc found in the starches of both parents; and in 

 irregularity of outline they are nearer to X. bowdeni. 

 The liilum in character and eccentricit} is the same a 

 that of N. sarniensis var. corusca major. The Lamellae 

 in character and arrangement, and the size are also a 

 those of this species. The aumher of lamellae is less than 

 in cither parent. In the polariscopic figures and 

 t n>ii s with selenite the relationship is closer to .V. sar- 

 niensis var. corusca major. In the qualitative iodine 

 reactions the raw grains behave more like those of .V. 

 sarniensis var. corusca major, but the heated srrain m ire 

 like those of the other species. In the qualitative reac- 

 tions with the chemical reagents the resemblanci an 

 closer to the reactions of X. bowdeni in the reactions with 

 chloral hydrate and sodium salicylate, hut closer I i lie 

 other parent in those with nitric aeid. potassium iodide, 

 potassium sulphocyanate, and potassium sulphide. The 

 starch of the hybrid X. abundance, in comparison with 

 the starches of the parents, contains a smaller mil 

 of compound grains and aggregates than cither, and only 

 mi occasional compound grain is seen of a type that was 

 noted exclusively in X. bowdeni; irregularity is more 

 than in X. sarniensis var. corusca major, hut consider- 

 ably less than in the other parent. The form i< in gen- 

 eral nearly mid-intermediate between the forms of the 

 parental starches, but somewhat nearer that of N. sar- 

 niensis Mir. corusca major. The hilum is in character 

 nearer N. bowdeni, but in eccentricity it exceeds thai of 

 either parent and is nearer N. sarniensis var. corusca 

 major. The lamellae are in both character and arrange- 

 ment nearer K. sarniensis var. corusca major, but the 

 number is notably less than in either parent. The i e is, 

 on the whole, intermediate, but somewhat nearer that of 

 N. bowdeni. In the polariscopic, selenite, and qualita- 

 tive iodine reactions it is nearer X. bowdeni. In the 

 qualitative chemical reactions with the six reagents re- 

 semblances lean to one or the other parent, hut. on the 

 whole the relationship is closer to .V. bowdeni. For the 

 most part the hybrids hear closer relationship- to each 

 other than does either to either parent. They vary much 

 in their parent leanings, each independently of the other, 

 so that while one hybrid may show a leaning to the seed 

 parent in a given character, the other hybrid may 

 in this same character lean as markedly toward the 

 other parent. Thus, in form A*, giantess is more 

 closely related to X. bowdeni, but X. abundance is 

 nearly mid-intermediate between the parents with an 

 inclination to A', sarniensis var. corusca major. In 

 liilum A", giantess is closer to X. sarniensis var. 

 corusca major, while X. abundance is closer to A'. 

 bowdeni in characters and to the other parent, in eccen- 

 tricity. In lamella' both are closer to X. sarniensis var. 

 corusca major. In size N. giantess is closer to N. sar 

 niensis var. corusca major, and X. abundance to V. bow- 

 deni. In the qualitative iodine reactions .V. giantess is 

 in the reactions of the ungelatinized grains closer to 

 .V. sarniensis var. corusea major, and in the gelatinized 

 grains closer to X. bowdeni; but X. abundance is in both 

 respects closer to N. bowdeni. In the qualitative rea< 

 tions with the chemical reagents X. giantess is with 

 certain reagents closer to one parent and with others 

 closer to the other parent, while X. abundance is 

 with all reagents to X. bowdeni. 



Reaction intensities I Light, Coi 



ture Reactions. 

 Polarization: 

 N. bowdeni, mi high, value 



N, num. var. cor. maj., moderate . ■ . than in N. 



bowdeni, value 00 

 N. gianl 



parent, value 80. 

 ibundancc, moderatelj high to verj high 



ess, value 

 [odine: 



'.' I "".■. deni e, value 50. 



N, sarn. vai coi I 1; dc< ; . di • pi r than 



deni, value 60 

 N. giantess, i lerati ly deep, the sami 



valui 60 

 N. abundance, m me hi N'. bowdeni, va 



( icntian violi ' 



N. bowdeni, moderate, value 46. 



N. Barn. var. cor. maj., light to moderate, lighter than 



value 40. 

 N. giantess, moderat deni, value 45. 



N. abundance, li^lit to moderate, Bame as N. sarn. var. cor. maj., 



value 40. 

 Safranin: 



N, bowdeni, moderate, value 60. 



N. sarn. var. cor. maj., moderate, mm vdeni, 



valuo 40. 

 \ T . giantess, moderate, the Bame aa N I -''!<rii. value 60. 

 N. abundance, moderate, less than N 



than N. sum. var. cor. maj., valu 

 Temperature: 



N. bowdeni, in majority at (17.0 to 67.9", in all at 74 ( 



74.5°. 

 N. earn. var. cor. maj., in majority at 70 to . 1°, in all but 



at 76 to 78.8 . mean 78.4 '. 

 N. giantess, in majority at 68.2 to 69.1", in all at 70.9 to 7J 



70.95°. 

 N. abundance, in majority at 69 to 69.9°, in all at 73 9 to 74.8°, 



mean 74.3°. 



N. bowdeni shows in the polarization and iodine 

 ■ ns lower reactivities than N. sarniensis var. corusca 



