526 



DATA OF PROPERTIES OF STARCHES OF PARENT- AND HYBRID-STOCKS. 



at various discrete points on the margin and proceeds 

 according to two methods which are even closer to those 

 observed under N. poeticus poetarum than those seen in 

 N. poeticus herrick. The main point of difference is 

 that there are more grains in which gelatinization pro- 

 ceeds inward from the discrete points on the margin, 

 producing large cup-shaped hollows in the ungelatinized 

 material. The gelatinized grains are much swollen, have 

 a thin capsule, and are as distorted as in N. poeticus 

 poetarum. N. poeticus dante shows qualitatively a 

 closer relationship to N. poeticus poetarum than to N. 

 poeticus ornatus. 



In this reaction N. poelicus dante shows qualita- 

 tively a somewhat closer relationship to N. poeticus 

 poetarum than does N. poeticus herrick. 



The reaction with chromic acid begins in 1 minute. 

 Complete gelatinization occurs in less than 0.5 per cent 

 of the entire number of grains and 5 per cent of the 

 total starch in 5 minutes ; in less than 0.5 per cent of the 

 grains and 34 per cent of the total starch in 15 minutes; 

 in about 2 per cent of the grains and 67 per cent of the 

 total starch in 30 minutes; in about 10 per cent of the 

 grains and 80 per cent of the total starch in 45 minutes ; 

 in about 15 per cent of the grains and 88 per cent of the 

 total starch in 60 minutes. (Chart D 260.) 



The hilum is not as distinct as in either parent, and 

 the lamellae are moderately distinct or indistinct as in 

 N. poeticus poetarum. Gelatinization begins at the 

 hilum and progresses according to the two methods de- 

 scribed under N. poeticus poetarum. There are not so 

 many grains which exhibit the second method described 

 in N. poeticus herrick, but more than in N. poeticus poe- 

 tarum. The fissuring is coarser and more extensive than 

 in N. poeticus poetarum and the striation is coarser. 

 The other method resembles very closely that described 

 under N. poeticus ornatus. The gelatinized grains are 

 much swollen, have as thin walls, and are as much dis- 

 torted as in N. poeticus poetarum. N. poeticus dante 

 shows qualitatively a somewhat closer relationship to N. 

 poeticus poetarum than to N. poeticus ornatus. N. 

 poeticus dante does not show so close a relationship to 

 N. poeticus poetarum as does N. poeticus herrick. 



The reaction with pyrogallic acid begins in 1 minute. 

 Complete gelatinization occurs in less than 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 37 per cent of the total starch in 15 minutes; in 

 about 42 per cent of the grains and 75 per cent of the 

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

 grains and 88 per cent of the total starch in 45 minutes ; 

 in about 55 per cent of the grains and 94 per cent of the 

 total starch in 60 minutes. (Chart D 262.) 



The hilum and lamellae are as distinct as in N. 

 poelicus poetarum. Gelatinization begins at the hilum 

 and proceeds according to the two methods described 

 under the parents. In a smaller majority of the grains 

 than in either N. poeticus poetarum or N. poeticus her- 

 rick, the same method is seen as that described for 

 the majority of the grains of N. poeticus poetarum, 

 but the starch included between the 2 furrows is less 

 apt to be fissured and more apt to become a nearly 

 homogeneous-looking, hyaline mass as in N. poeticus 

 ornatus. In the minority, which are gelatinized accord- 

 ing to the second method described under N. poeticus 



poetarum and the first described under N. poeticus orna- 

 tus, there is a close resemblance in many to the method 

 as described under N. poeticus ornatus, and in the rest 

 to that described under N. poeticus poetarum. The 

 gelatinized grains are as much swollen, have as thin 

 capsules, and are as distorted as in N. poeticus poetarum. 

 In this reaction N. poeticus dante shows qualitatively a 

 somewhat closer relationship to N. poeticus poetarum 

 than to N. poeticus ornatus. N. poeticus dante does not 

 show so close a relationship to N. poeticus poetarum 

 as does N. poeticus herrick. 



The reaction with nitric acid begins immediately. 

 Complete gelatinization occurs in about 1 per cent of 

 the entire number of grains and 19 per cent of the total 

 starch in 5 minutes ; in about 14 per cent of the grains 

 and 65 per cent of the total starch in 15 minutes; in 

 about 25 per cent of the grains and 72 per cent of the 

 total starch in 30 minutes ; in about 38 per cent of the 

 grains and 76 per cent of the total starch in 45 minutes; 

 in about 47 per cent of the grains and 80 per cent of the 

 total starch in 60 minutes. (Chart D 263.) 



The hilum is distinct as in the parents and the lamellae 

 are as distinct as in N. poeticus poetarum. Gelatiniza- 

 tion begins at the hilum, and proceeds according to the 

 two types described under N. poeticus poetarum. There 

 is, however, a smaller majority than in N. poeticus poe- 

 tarum or N. poeticus herrick in which the first type is 

 seen, and the grains which are gelatinized in this way are 

 more distinctly granular and more regularly striated, 

 and show less of the irregular pitted appearance and of 

 the irregular criss-cross fissuring than those two starches, 

 but they are not quite so distinctly nor so regularly 

 granular as in 2V. poeticus ornatus. There are fewer 

 which show the second type of gelatinization than in 

 either parent or in 2V. poeticus herrick, and those which 

 show this type resemble those noted in 2V. poeticus poe- 

 tarum. The gelatinized grains are much swollen and 

 the capsules are as thin and the grains as distorted as in 

 2V. poelicus poetarum. 



In this reaction 2V. poeticus dante shows qualitatively 

 a closer relationship to 2V. poeticus poetarum than to 

 2V. poeticus ornatus. 



2V. poeticus dante does not show so close a relationship 

 to 2V. poeticus poetarum as does 2V. poeticus herrick, and 

 in some characteristics shows a closer relationship to 

 2V. poeticus ornatus than does 2V. poeticus herrick but in 

 some it is much further away than is 2V. poeticus herrick. 



The reaction with sulphuric acid begins immediately. 

 Complete gelatinizatiou occurs in about 75 per cent of 

 the entire number of grains and 95 per cent of the total 

 starch in 2 minutes; in more than 99 per cent of the 

 grains and total starch in 5 minutes. (Chart D 264.) 



The hilum, as in the parents, is distinct and a bubble 

 is formed there as frequently as in 2V. poeticus ornatus, 

 and the lamella are as often moderately distinct as in 

 2V. poeticus ornatus. Gelatinization begins at the hilum 

 and progresses according to two methods already de- 

 scribed under the parents. The majority of the grains 

 follows in general the method described for a similar 

 number of the grains of 2V. poeticus poetarum and 2V. 

 poeticus herrick and are closer to 2V. poeticus poetarum 

 than to 2V. poeticus herrick. A larger minority, however, 

 than in 2V. poeticus poetarum and 2V. poeticus herrick 



