NARCISSUS. 



519 



grains and 49 per cent of the total starch in 15 minutes; 

 in about 36 per cent of the grains and 02 per cent of the 

 total starch in 30 minutes; in about 50 per cent of the 

 grains and 75 per cent of the total starch in 45 minutes; 

 in about 60 per cent of the grains and 80 per cent of the 

 total starch in 60 minutes. (Chart D 276.) 



The reaction with sodium sulphide begins in about 

 half a minute. Complete gelatinization occurs in about 

 0.5 per cent of the entire number of grains and 3 per cent 

 of the total starch in 5 minutes ; in about 3 per cent of 

 the grains and 12 per cent of the total starch in 15 

 minutes; in about 12 per cent of the grains and 33 per 

 cent of the total starch in 30 minutes; in about 20 per 

 cent of the grains and 53 per cent of the total starch in 

 45 minutes ; in about 27 per cent of the grains and 56 per 

 cent of the total starch in 60 minutes. (Chart D 277.) 



The reaction with sodium salicylate begins imme- 

 diately. Complete gelatinization occurs in about 27 per 

 cent of the entire number of grains and 50 per cent of 

 the total starch in 5 minutes; in about 90 per cent of 

 the grains and 92 per cent of the total starch in 15 min- 

 utes; in over 99 per cent of both the grains and total 

 starch in 30 minutes. (Chart D 278.) 



The reaction with calcium nitrate begins immediately. 

 Complete gelatinization occurs in about 2 per cent of the 

 entire number of grains and 3 per cent of the total starch 

 in 5 minutes ; in about 3 per cent of the grains and 9 per 

 cent of the total starch in 15 minutes; in about 6 per cent 

 of the grains and 19 per cent of the total starch in 30 

 minutes ; in about 14 per cent of the grains and 43 per 

 cent of the total starch in 45 minutes; in about 17 per 

 cent of the grains and 53 per cent of the total starch in 

 60 minutes. (Chart D 279.) 



The reaction with uranium nitrate begins in but few 

 grains in 1 minute. Complete gelatinization of any of 

 the grains was not observed and about 1 per cent of the 

 total starch was gelatinized in 5 minutes; less than 0.5 

 per cent of the entire number of grains gelatinized and 

 5 per cent of the total starch in 15 minutes; complete 

 gelatinization occurs in about 2 per cent of the entire 

 number of grains and 7 per cent of the total starch in 

 30 minutes ; in about the same percentage of the grains 

 and 10 per cent of the total starch in 45 minutes; in 

 about the same percentage of grains and total starch 

 (12 per cent) in 60 minutes. (Chart D 280.) 



The reaction with strontium nitrate begins in a few 

 grains in half a minute. Complete gelatinization occurs 

 in about 3 per cent of the entire number of grains and 

 10 per cent of the total starch in 5 minutes; in about 13 

 per cent of the grains and 42 per cent of the total starch 

 in 15 minutes ; in about 24 per cent of the grains and 55 

 per cent of the total starch in 30 minutes; in about 37 

 per cent of the grains and 63 per cent of the total starch 

 in 45 minutes ; in about 38 per cent of the grains and 66 

 per cent of the total starch in 60 minutes. (Chart 

 D281.) 



The reaction with cobalt nitrate begins in rare grains 

 in 1 minute. Complete gelatinization was not observed 

 in any of the grains, and in 0.5 per cent of the total starch 

 in 5 minutes; complete gelatinization occurs in about 

 0.5 per cent of the entire number of grains and 1 per cent 

 of the total starch in 15 minutes; in about the same 

 percentage of the grains and 3 per cent of the total starch 



in 30 minutes; little if any further progress in 45 and 

 60 minutes, respectively. (Chart D 282.) 



The reaction with copper nitrate begins in a few 

 grains in 1 minute. Complete gelatinization occurs in 

 about 0.5 per cent of the entire number of grains and 

 2 per cent of the total starch in 5 minutes; in about 



1 per cent of the grains and s per cent of the total starch 

 in 15 minutes ; in about 2 per cent of the grains and 9 per 

 cent of the total starch in 30 minutes; in about 2 per 

 cent of the grains and 10 per cent of the total starch in 

 45 minutes; in about 3 per cent of the grains and 15 per 

 cent of the total starch in 60 minutes. (Chart D 283. ) 



The reaction with cupric chloride begins in a few 

 grains in 1 minute. Complete gelatinization was not 

 observed in any of the grains and 1 per cent of the total 

 starch in 5 minutes; in about 1 per cent of the grains 

 and 2 per cent of the total starch in 15 minutes ; in about 



2 per cent of the grains and 4 per cent of the total starch 

 in 30 minutes ; in about 3 per cent of the grains and 5 

 per cent of the total starch in 45 minutes; in about 

 4 per cent of the grains and 6 per cent of the total starch 

 in 60 minutes. (Chart D 284.) 



The reaction with barium chloride begins in a few 

 grains (a slight deepening of the fissures) in 2 minutes. 

 Complete gelatinization was not observed in any of the 

 entire number of grains and has begun in but few grains 

 in 5 minutes; very slight if any advance occurs in 15, 30, 

 45, and 60 minutes, respectively. Perhaps about 1 per 

 cent of the total starch is gelatinized. (Chart D 285.) 



The reaction with mercuric chloride begins in rare 

 grains in 1 minute. Complete gelatinization was not 

 observed in any of the entire number of grains and the 

 reaction was begun in very few in 5 minutes; complete 

 gelatinization occurs in about 0.5 per cent of the entire 

 number of grains and 3 per cent of the total starch in 

 15 minutes ; in about 1 per cent of the grains and 4 per 

 cent of the total starch in 30 minutes ; slight advance in 

 the grains and the total starch in 45 minutes ; in about 2 

 per cent of the grains and 7 per cent of the total starch 

 in 60 minutes. (Chart D 286.) 



Narcissus poetictjs poktarum (Pollen Parent). 



(Plates 9, 11, and 12, figs. 50, 53, 65, and 68; Charts D 259 to D 264.) 

 Histologic Properties. 

 In form the grains are usually simple and isolated, 

 but compound grains occur somewhat more frequently 

 than in N. poeticus ornatus, and aggregates as frequently 

 as in that starch. The compound grains belong to the 

 same three types as have been noted under N. poeticus 

 ornatus: (1) Most frequently, 2 or 3 equal-sized, small 

 grains inclosed by 2 or 3 common secondary lamella?; 

 (2) 1 or 2 small grains adherent to the sides or either 

 end of a large grain and all inclosed by 1 to 3 common 

 secondary lamella?; (3) 4 or more hila embedded in a 

 homogeneous-looking, central mass of starch, surrounded 

 by 2 or 3 lamella?. The aggregates usually consist of 

 2 or 3 small grains linearly arranged. While the total 

 number of aggregates is about the same there are more 

 aggregates formed of compound grains, or of a compound 

 and 1 simple grain, than in N. poeticus ornatus; and 

 also a larger number of simple primary grains which 

 have later been inclosed in several layers of a secondary 

 starch deposit. The grains are more irregular than are 



