TRITONIA. 



G91 



in about 22 per cent of the grains and 29 per cent of the 

 total starch in 60 minutes. (Chart D 495.) 



The reaction with sodium salicylate begins imme- 

 diately. Complete gelatinization occurs in about 11 per 

 cent of the entire number of grains and 20 per cent of 

 the total starch in 5 minutes; in about 49 per cent of the 

 grains and 60 per cent of the total starch in 15 minutes; 

 in about 92 per cent of the grains and 95 per cent of the 

 total starch in 30 minutes. (Chart D496.) 



The hilum becomes distinct and a bubble is often 

 formed there. The lamellae are not visible. Gelatiniza- 

 tion is preceded by a pitted appearance as in T. pottsii, 

 and usually begins at the distal margin, but in some of 

 the small grains at the hilum. Gelatinization progresses 

 smoothly without any of the cracks or fissures noted 

 under T. pottsii, and the proximal end is usually the 

 most resistant instead of the portion immediately dis- 

 tal to the hilum as in T. pottsii. The gelatinized grains 

 are considerably swollen, and are distorted, and do not 

 show much resemblance to the form of the untreated 

 grains. 



The reaction with calcium nitrate begins immedi- 

 ately. 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 5 per cent of the total starch in 15 minutes; 

 in about 6 per cent of the grains and 10 per cent of 

 the total starch in 30 minutes; in about 8 per cent of 

 the grains and 14 per cent of the total starch in 45 

 minutes ; in about the same percentage of both the 

 grains and total starch in GO minutes. (Chart D 497.) 



The reaction with uranium nitrate begins in rare 

 grains in half a minute. Complete gelatinization was not 

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

 total starch is gelatinized in 5 minutes ; complete gela- 

 tinization occurs in about 1 per cent of the entire num- 

 ber of graius and 3 per cent of the total starch in 15 

 minutes; in about the same percentage of the grains 

 and 4 per cent of the total starch in 30 minutes; in 

 about 2 per cent of the grains and 5 per cent of the 

 total starch in 45 minutes ; in about the same percentage 

 of both the grains and total starch in 60 minutes. (Chart 

 D498.) 



The reaction with stronthim nitrate begins imme- 

 diately. Complete gelatinization occurs in about 2 per 

 cent of the grains and 3 per cent of the total starch in 5 

 minutes ; in about 5 per cent of the grains and 8 per 

 cent of the total starch in 15 minutes; in about 12 per 

 cent of the grains and 23 per cent of the total starch 

 in 30 minutes; in about 23 per cent of the grains and 

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

 33 per cent of the grains and 43 per cent of the total 

 starch in 60 minutes. (Chart D 199.) 



The reaction with cobalt nitrate begins in a few 

 grains in half a minute. Complete gelatinization occurs 

 in but rare grains, less than 0.5 per cent of the entire 

 number and about 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 the same percentage 

 of the grains and 3 per cent of the total starch in 30 

 minutes ; in the same percentage of the grains and 4 per 

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

 in 60 minutes. (Chart D 500.) 



The reaction with copper nitrate begins in rare 

 grains immediately. Complete gelatinization occurs in 

 about 1 per cent of the grains and 5 per cent of the 

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

 grains and 6 per cent of the total starch in 15 minutes; 

 in about 3 per cent of the grains and 7 per cent of the 

 total starch in 30 minutes; in about the same percentage 

 of grains and slight advance in the total starch in 45 

 minutes; very slight advance in the grains ami about 

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

 D501.) 



The reaction with cupric chloride begins in rare 

 grains immediately. 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 3 per cent of the grains and 6 per 

 cent of the total starch in 30 minutes; in about 4 per 

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

 45 minutes ; in about 5 per cent of the grains and 8 per 

 cent of the total starch in 60 minutes. (Chart D 502.) 



The reaction with barium chloride begins in very 

 rare grains in 2 minutes. Complete gelatinization was 

 not observed in any of the grains and has begun in but 

 few with a slight gelatinization around the hilum in 5 

 minutes; complete gelatinization was not observed in any 

 grains and about 1 per cent of the total starch gelatinized 

 in 15 minutes; very slight in any further advance in 30, 

 45, and 60 minutes, respectively. (Chart U 503.) 



The reaction with mercuric chloride begins in rare 

 grains in 1 minute. Complete gelatinization was not 

 observed in any of the grains but in 1 per cent of the 

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

 entire number of grains and 2 per cent of the total 

 starch in 15 minutes; in about 2 per cent of the grains 

 and 3 per cent of the total starch in 30 minutes; in 

 about the same percentage of the grains and 4 per cent 

 of the total starch in 45 minutes; in about the same 

 percentage of both the grains and the total starch in 

 60 minutes. (Chart D 504.) 



Tritonia orocosm^eflora (Hybrid). 



(Plate 20, fig. 120; Charts D 484 to D 504.) 

 Histologic Properties. 

 In form the majority of the grains are simple, and 

 are separated components of aggregates, with the excep- 

 tion of a few which still either remain in small aggre- 

 gates or are permanently isolated grains. The proportion 

 of the latter is about as in T. pottsii, but considerably 

 smaller than in T. crocosmia aurea. Rare compound 

 grains composed of 2 components are observed as fre- 

 quently as in T. pottsii, but less frequently than in T. 

 crocosmia aurea. Well-defined pressure facets are pres- 

 ent on the majority of the grains. Since the proportion 

 of separated grains is as large as in T. pottsii, the pres- 

 sure facets are as frequently observed as in that species, 

 but are more numerous than in T. crocosmia aurea. 

 The surface of the grain is generally regular, in some- 

 what more grains than in T. pottsii and in approxi- 

 mately the same number as in T. crocosmia aurea. The 

 same forms of irregularities as noted for both parents 

 have been observed. The conspicuous forms of the sepa- 

 rated grains are the same as in both parents, but the 

 high bell-jar shaped and the ovoid with squared end are 



