HIPPEASTRUM — HJEMANTHUS. 



429 



grains are swollen and distorted so that they do not 

 resemble the untreated grain, as in both parents. 



In the reaction with sodium salicylate II. dceones- 

 zvplujr shows qualitatively a very close relationship to 

 both parents, the same to one as to the other, but a charac- 

 ter which appears in the parents is often further devel- 

 oped in the hybrid. 



The reaction with calcium nil rate 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 of the total starch in 5 minutes ; complete gela- 

 tinization occurs 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 3 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; little if any 

 further advance in 60 minutes. (Chart D 77.) 



The reaction with uranium nitrate begins in rare 

 grains in 1 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 the 

 same percentage of the 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; little 

 if any further advance in 45 and 60 minutes. (Chart 

 D78.) 



The reaction with strontium nitrate begins in rare 

 grains in 1 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 2 per 

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

 15 minutes; in about 4 per cent of the grains and 9 per 

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

 cent of the grains and 13 per cent of the total starch in 

 45 minutes ; in about 13 per cent of the grains and 23 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 occurs in rare 

 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 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 1.5 per cent of the total 



starch in 30 minutes; about the Bame in both !. r > and 



60 minutes. (Chart D 80.) 



The reaction with copper nitrate begins in rare grains 

 in half a minute. Complete gelatini curs in a 



few grains, less than 0.5 per cent of the entire number 



of grains and 0.5 per cent of the total starch in 5 min- 

 utes; in about .1 per cent of the grains ami 1.5 per cent 

 of the total starch in 15 minutes; Blight p in 30 



minutes: in about 1 .•"> per cent cf tin- grains ami •.' per 

 cent of the total starch in 45 minutes; about the 

 in 60 minutes. (Chart D 81.) Qelatinizs ceeds 



through the mesial region along the course of deep fis- 

 sures, the process being completed at the distal ma 

 more rapidly than at the proximal end in elongated 

 grains. 



The reaction with cupric chloride begins in very rare 

 grains in 1 minute. Complete gelatinization occurs in 

 very rare grains and the process 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 1.5 per 

 cent of the total starch in 30 minutes; very little if any 

 further progress in 45 and 60 minutes. (Chart I) 82.) 



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 also the total starch in 5 minutes ; 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; little if any further advance 

 in 45 and 60 minutes. (Chart D 83.) 



The reaction with mercuric chloride begins in raro 

 grains in 1 minute. No complete gelatinization was ob- 

 served among the entire number of grains, but about 1 

 per cent of the total starch is gelatinized 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 1 

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

 in 30 minutes; very slight advance in 45 minutes; in 

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

 starch in 60 minutes. (Chart D 84.) 



3. HiEMANTHUS. 



This genus comprises about 40 species of African 

 bulbous plants which for the most part are natives of the 

 Cape region. Baker (Amaryllidege, p. 62) divides them 

 into 4 subgenera : Nerissa, Gyaxis, Melicho, and Diacles. 



Starches were obtained from two sets of parent- 

 stocks and hybrids : 



5. Bwmanthus katherince Baker, B. magnificus Herb. (B. 



punioeus var. magnified Herb., B. rouperi) , and the hybrid 

 B. andromeda. The specimen of B. kathennw was obtained 

 from E. H. Krelage & Son, Haarlem, Holland ; that of B. 

 magnificus from Haage & Schmidt, Erfurt, Germany; and 

 that of B. andromeda from Van Velsen Brothers, Overveen, 

 Holland. 



6. Bcemanthus katherince Baker, B. pumceus Lmn. (H. 



redoubteanus Roem.), and the hybrid //. komg albert. 

 All three specimens were from the gardens of E. H. Krel- 

 age & Son, Haarlem, Holland. 



5. Starches of H.emanthus katherin.ze, H. mag- 

 nificus., AND H. ANDROMEDA. 



HWMANTHUS KATHERINiE (SEED PARENT). 

 (Plates 3 and 4, figs. 16 and 19; Charts D 85 to D 105.) 

 Histologic Properties. 

 In form the grains are usually simple and isolated 

 with the exception of a small number which occur in 

 aggregates, generally of 2 to 5 components. Pressure 

 facets are rarely observed. Few compound grains of 

 usually 2 or 3, rarely as many as 6, components are pres- 

 ent. The grains are frequently irregular, owing chiefly 

 to the following causes : ( 1 ) The formation of a secondary 

 set of lamellffi placed at various angles to the primary set ; 

 (2) to a slight shifting of the longitudinal axis of the 

 primary set of lamella' with a resultant curvature at 



