HIPPEASTRUM. 



41 



TABLE A 2. 



cyanate (in one being closer to the seed parent and in 

 three mid-intermediate) ; highest with polarization, 

 iodine, sulphuric acid, potassium hydroxide, and sodium 

 hydroxide (in two being closer to the seed parent and 

 in three closer to the pollen parent) ; and lowest with 

 chloral hydrate, chromic acid, pyrogallic acid, and so- 

 dium salicylate (in three being closer to the seed parent 

 and in one closer to the pollen parent) . 



The following is a summary of the reaction-inten- 

 sities : Same as seed parent, 2 ; same as pollen parent, 3 ; 

 same as both parents, 8 ; intermediate, 4 ; highest, 5 ; 

 lowest, 4. 



The seed parent shows a stronger influence than the 

 pollen parent on the characters of the starch of the 

 hybrid. 



COMPOSITE CURVES OF THE REACTION-INTENSITIES. 



The following section treats of the composite curves 

 of the reaction-intensities showing the differentiation 

 of the starches of Hippeastrum titan, H. cleonia, and //. 

 titan-cleonia,. (Chart P 2.) 



Among the conspicuous features of this chart are : 



(1) The closeness of all three curves, indicating a 

 very close relationship of all three starches and plant- 

 sources. 



(2) The generally lower position of the curve of 

 Hippeastrum titan in relation to the curve of the other 

 parent, it being lower in the reactions with iodine, gen- 

 tian violet, safranin, temperature, chloral hydrate, pyro- 

 gallic acid, nitric acid, hydrochloric acid, potassium 

 hydroxide, potassium iodide, potassium sulphocyauate, 

 sodium hydroxide, sodium sulphide, and strontium ni- 

 trate; higher with polarization and chromic acid; and the 

 same or practically the same with sulphuric acid, potas- 

 sium sulphide, sodium salicylate, calcium nitrate, ura- 

 nium nitrate, cobalt nitrate, copper nitrate, cupric 

 chloride, barium chloride, and mercuric chloride. 



(3) The curve of Hippeastrum titan is very high 

 in the polarization and chromic-acid reactions; high 

 with sulphuric acid and sodium salicylate ; moderate 

 with iodine, gentian violet, safranin, and pyrogallic acid ; 

 low with temperature, nitric acid, hydrochloric, and 

 potassium hydroxide; very low with chloral hydrate, 

 potassium iodide, potassium sulphocyauate, potassium 

 sulphide, sodium hydroxide, sodium sulphide, calcium 

 nitrate, uranium nitrate, strontium nitrate, cobalt nitrate, 

 copper nitrate, cupric chloride, barium chloride, and 

 mercuric chloride. 



(4) The curve of Hippeastrum cleonia, is very high 

 in the polarization and chromic-acid reactions; high with 

 pyrogallic acid, sulphuric acid, and sodium salicylate; 

 moderate in the iodine, gentian violet, and safranin ; and 

 low witli temperature, chloral hydrate, nitric acid, hydro- 

 chloric acid, potassium hydroxide, and potassium sulpho- 

 cyanate ; and very low with potassium iodide, potassium 

 sulphide, sodium hydroxide, sodium sulphide, calcium 

 nitrate, uranium nitrate, strontium nitrate, cobalt ni- 

 trate, copper nitrate, cupric chloride, barium chloride, 

 and mercuric chloride. 



(5) The curve of the hybrid is very high in the 

 polarization and sulphuric-acid reactions; high with 

 chromic acid and sodium salicyla.te ; moderate with 

 iodine, gentian violet, safrauin, and pyrogallic acid ; low 

 with temperature, nitric acid, hydrochloric acid, potas- 

 sium hydroxide, and potassium sulphocyanate ; and very 

 low with chloral hydrate, potassium iodide, potassium 

 sulphide, sodium hydroxide, sodium sulphide, calcium 

 nitrate, uranium nitrate, strontium nitrate, cobalt ni- 

 trate, copper nitrate, cupric chloride, barium chloride, and 

 mercuric chloride. 



