HIPPEASTRUM. 



425 



cent of the total starch in 30 minutes ; in more than 99 

 per cent of both the grains and total starch in 45 min- 

 utes. (Chart D 76.) A small bubble appears at the 

 hilum and in most of the grains is not so frequently 

 inclosed within a fissure, but reacts as described in PI. 

 dccones. The definition of the lamellae and the formation 

 of the refractive border is the same as in H. dceones. 

 Fissures either proceeding from or intersecting the hilum 

 are less frequently formed just previous to the expulsion 

 of the bubble than in H. dceones. Gelatinization begins 

 at the margin of the grain, and the various methods are 

 found which are described in H. dceones, but the process 

 in more grains begins at the distal margin and progresses 

 towards the proximal end. The gelatinized grains are 

 swollen and much distorted so that they do not resemble 

 the untreated grain, as in H. dceones. 



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 

 also in the 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; very little if any further advance in 60 

 minutes. ( Chart B 77.) 



The reaction with uranium nitrate begins in rare 

 grains in 1 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 3 per cent of the total starch in 15 

 minutes; slight progress in 30 minutes; and in about 3 

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

 in 45 minutes; little if any further advance in 60 min- 

 utes. ( Chart D 78.) 



The reaction with strontium nitrate begins in a few 

 grains 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 4 per cent 

 of the grains and 5 per cent of the total starch in 15 

 minutes ; in about 5 per cent of the grains and 7 per cent 

 of the total starch in 30 minutes ; in about 6 per cent of 

 the grains and 9 per cent of the total starch in 45 min- 

 utes; in about 9 per cent of the grains and 14 per cent of 

 the total starch in 60 minutes. (Chart D 79.) 



The reaction with cobalt nitrate begins in rare grains 

 in 1 minute. Complete gelatinization was not observed 

 among the grains, and the process has begun in but few, 

 much less than 0.5 per cent of both the entire number 

 of grains and total starch, in 5 minutes ; complete gela- 

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

 ber of grains and 2 per cent of the total starch in 15 min- 

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

 the total starch in 30 minutes ; about the same in both in 

 45 and 60 minutes. (Chart D 80.) 



The reaction with copper nitrate begins in rare grains 

 in half a minute. Complete gelatinization occurs in less 

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

 starch in 5 minutes; slight progress in 15 and 30 min- 

 utes ; in about 0.5 per cent of the grains and 1 per cent 

 of the total starch in 45 minutes ; in about 1 per cent of 

 the grains and 2 per cent of the total starch in 60 min- 

 4 



utes. (Chart D 81.) The reaction proceeds through the 

 mesial region along the course of deep fissures, in elon- 

 gated forms gelatinization of the distal margin being 

 completed before the proximal end. 



The reaction with cupric chloride begins in very rare 

 grains in 1 minute. Complete gelatinization occurs in 

 rare grains and has begun in but rare grains, much less 

 than 0.5 per cent, of both the entire number of grains 

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

 total starch in 30 minutes; in about 1.5 per cent of the 

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

 in about the same in 60 minutes. (Chart D 82.) The 

 reaction proceeds along the fissures through the mesial 

 region, the distal margin being more quickly gelatinized 

 than the proximal end. 



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 as 

 well as in the total starch in 5 minutes ; very little if any 

 progress in 15 minutes; still but rare grains completely 

 gelatinized and 0.5 per cent of the total starch in 30 

 minutes; in about the same percentage of the grains and 

 1 per cent of the total in 45 minutes ; very little if any 

 further advance in 60 minutes. (Chart D 83.) 



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 entire number of grains 

 as well as in the 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; very little if any further advance in 60 

 minutes. (Chart D 84.) 



HIPPEASTRUM DRONES-ZEPHYR (HYBRID). 



(Plate 3, fig. 15; Charts D 64 to D 84.) 

 HISTOLOOIC PROPERTIES. 



In form the grains are generally simple and isolated. 

 There are more grains in aggregates and more compound 

 grains than in either parent; in this respect the hybrid 

 is nearer to H. dceones. The long, slender, finger-like and 

 root-like compound grains and aggregates characteristic 

 of H. dceones are not noted here. The grains are less 

 regular than those noted under either parent, but nearer 

 to H. dceones. The irregularities are due to the same 

 causes as in the parents. The conspicuous forms are 

 nearly round, round, pure ovoid, and plano-convex. 

 There are also reniform, triangular, and elliptical forms. 

 In form //. dceones-zephyr is somewhat nearer H. zephyr 

 than //. dceones, though the grains of all three starches 

 so closely resemble one another that nearly all differences 

 are of minor importance. 



The hilum is as distinct as in H. dceones and is more 

 frequently fissured than in either parent, and in this the 

 grains are closer to H. dceones. The fissures are of the 

 same character as those noted in the parents, with a pre- 

 dominance of the large, irregularly branching, trans- 

 verse, oblique or longitudinal lines which are more char- 

 acteristic of H. zephyr than those of H. dceones. The 



