HIPPEASTRUM. 



403 



The gelatinized grains are large and considerably 

 distorted, but retain some of the form of the untreated 

 grain. 



The reaction with potassium sulphide begins in rare 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in about 0.5 per cent of the 

 grains and 1 per cent of the total starch in 15 minutes; 

 in about 1 per cent of the grains and 2 per cent of the 

 total starch in 30 minutes; slight advance in 45 min- 

 utes; in about the same percentage of the grains and 3 

 per cent of the total starch in 60 minutes. (Chart D 31.) 



The reaction with sodium hydroxide begins in a few 

 grains in half a minute. Complete gelatinization occurs 

 in about 0.5 per cent of the entire number of grains and 

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



1 per cent of the grains and 5 per cent of the total starch 

 in 15 minutes; in about 10 per cent of the grains and 

 23 per cent of the total starch in 30 minutes; in about 16 

 per cent of the grains and 25 per cent of the total starch 

 in 45 minutes ; in about 20 per cent of the grains and 28 

 per cent of the total starch in 60 minutes. (Chart D 32.) 



The reaction with sodium sulphide begins in a few 

 grains in half a minute. Complete gelatinization occurs 

 in about 1 per cent of the entire number of grains and 



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

 2 per cent of the grains and 5 per cent of the total starch 

 in 15 minutes; in about 6 per cent of the grains and 9 

 per cent of the total starch in 30 minutes ; in about 7 per 

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

 in 45 minutes; in about 11 per cent of the grains and 13 

 per cent of the total starch in 60 minutes. (Chart D 33.) 



The reaction with sodium salicylate begins imme- 

 diately. Complete gelatinization occurs in about 13 per 

 cent of the grains and 16 per cent of the total starch in 

 5 minutes ; in about 80 per cent of the grains and 85 per 

 cent of the total starch in 15 minutes; in about 99 per 

 cent of the grains and in more than 99 per cent of the 

 total starch in 30 minutes. (Chart D 34.) A small 

 bubble appears at the hilum, which is not inclosed within 

 a fissure in most of the grains, much less frequently 

 than in II. titan, and it expands much less than in that 

 variety. The lamellae become a little more distinct and 

 the refractive border a little more prominent than in 

 PI. titan. A fissure less frequently proceeds from the 

 hilum previous to the beginning of the process of gela- 

 tinization than in //. titan. Gelatinization often be- 

 gins and proceeds as noted in H. titan, but it starts at 

 the distal end less frequently than in that variety, pro- 

 ceeding toward the proximal end. The gelatinized grains 

 are much swollen and much distorted, so that they do not 

 resemble the untreated grain as in H. titan. 



The reaction with calcium nitrate begins in rare 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 

 total starch in 5 minutes; in about 0.5 per cent of the 

 grains and 1 per cent of the total starch in 15 minutes ; 

 slight progress in 30 minutes; in about 1 per cent of the 

 grains and 2 per cent of the total starch in 45 minutes; 

 in about 2 per cent of the grains and 3 per cent of the 

 total starch in 60 minutes. (Chart D 35.) 



The reaction with uranium nitrate begins in rare 

 grains in 1 minute. Complete gelatinization occurs in 

 less than 0.5 per cent of the entire number of grains and 



total starch in 5 minutes; in about 0.5 per cent of the 

 grains and 1 per cent of the total starch in 15 minutes; 

 in about 1 per cent of the grains and 2 per cent of the 

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

 grains and 3 per cent of the total starch in 45 minutes ; 

 little if any further advance in 60 minutes. (Chart 

 D36.) 



The reaction with strontium nitrate begins in a few 

 grains in 1 minute. 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 ; slight advance 

 in 15 minutes ; in about 3 per cent of the entire number of 

 grains and 5 per cent of the total starch in 30 minutes; 

 in about 4 per cent of the grains and 8 per cent of the 

 total starch in 45 minutes; in about 8 per cent of the 

 grains and 16 per cent of the total starch in 60 minutes. 

 (Chart D 37.) 



The reaction with colalt nitrate begins in rare grains 

 in 1 miaute. Complete gelatinization occurs in less than 

 0.5 per cent of the entire number of grains and total 

 starch in 5 minutes; complete gelatinization occurs in 

 0.5 per cent of the grains and 1 per cent of the total 

 starch in 15 minutes; in about 1 per cent of the grains 

 and 2 per cent of the total starch in 30 minutes ; little if 

 any further progress in 45 and 60 minutes. (Chart D 38.) 



The reaction with copper nitrate begins in about half 

 a minute. Complete gelatinization occurs in about 0.5 

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

 of the total starch in 5 minutes; slight progress in 15 

 minutes ; in about 1 per cent of the grains and 2 per cent 

 .of the total starch in 30 minutes; little if any further 

 progress in 45 and 60 minutes. (Chart D 39.) 



The reaction with cuprie chloride begins in very 

 rare grains in 1 minute. Complete gelatinization occurs 

 in less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes; still in less than 0.5 per 

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

 about 0.5 per cent of the grains and 1 per cent of the 

 total starch in 30 minutes; very little if any further 

 progress in 45 and 60 minutes. (Chart D 40.) 



The reaction with barium chloride begins in very 

 rare grains in 1 minute. Complete gelatinization occurs 

 in less than 0.5 per cent of the entire number of grains 

 and total starch in 5 minutes ; still less than 0.5 per cent 

 of the grains and total starch in 15 minutes; little if 

 any further progress in 30, 45, and 60 minutes, respec- 

 tively. ( Chart D 41.) 



The reaction with mercuric chloride begins in very 

 rare grains in 1 minute. Complete gelatinization occurs 

 in less than 0.5 per cent of the grains and total starch in 

 5 minutes; slight progress in 15 minutes; in about 0.5 

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

 30 minutes; little if any further advance in 45 and 60 

 minutes, respectively. (Chart D42.) 



HIPPEASTRUM TITAN-CLEONIA (HYBRID). 



(Plate 1, fig. 9; Charts D 22 to D 42.) 

 HISTOLOGIC PROPERTIES. 



In form the grains are usually simple and isolated, 

 but compound grains and aggregates occur about as fre- 

 quently as in H. titan and are of the same character as 

 those noted under both parents. The grains are not so 

 irregular in form as those of H. cleonia but slightly more 

 irregular than those of H. titan. The irregularities 



