CIUNUM. 



477 



within an area about one-fourth of the distance from 

 this point to the margin. One comparatively coai 

 refractive lamella, which is placed al varying distances 

 from the hilum, is usually present, and often the fine 

 lamellae may be arranged in groups between two or more 

 fairly coarse refractive lamellae, the number varying 

 according to shape and length of grain. Occasionally 

 a band of 2 or 3 moderately coarse lamella; are found 

 about the middle or somewhat nearer the distal end of the 

 grain. A lustrous band in which the lamellae may be 

 very indistinct is sometimes present at the distal mar- 

 gin, or in the form of a marginal border around the 

 grain. This band is less frequently observed, but the 

 component lamellae arc often more discernible than in 

 C. longifolium; but it was not observed extending around 

 the entire margin in the grains of C. moorei. A second- 

 ary set of lamella; placed at varying angles to the pri- 

 mary set is rarely observed, although slightly more often 

 than in C. longifolium, but less so than in C. moorei. 

 Since the lamella; forming the band are of a different 

 character from those of the main body of the grain, 

 and arc separated from the latter by a lamella that is 

 coarse and refractive, as in both parents, they may repre- 

 sent a secondary set. The number counted in the pri- 

 mary set of large grains varies from 45 on the broadened 

 grains to G5 on the elongated grains. The lamellas in 

 character and number more closely approximate those of 

 C. moorei than those of the other parent. 



The size of the grains varies from the smaller which 

 are 3 by 2/t, to the larger elongated forms which are 72 

 by 3-f/x, and the broadened grains winch are 62 by 80>, 

 in length and breadth. The common size of the elon- 

 gated forms is 42 by 28/a, and of the broadened forms 

 36 by iifi, in length and breadth. The grains are much 

 more evenly divided into elongated and broadened grains 

 than in cither parent. On the whole, the grains more 

 closely approximate those of C. moorei. 



Polariscopic Properties. 



The figure is slightly eccentric to very eccentric. 

 The mean is more eccentric than in C. longifolium, and 

 while the range is the same as in C. moorei in the major- 

 ity, the figure is not so eccentric and hence the mean is 

 slightly less than in the latter. The figure is usually 

 clean-cut, more so than in C. longifolium, but owing to 

 more variation in the different grains it is not so clean- 

 cut as in C. moorei. The lines are usually fine and in- 

 tersect obliquely. They are sometimes straight, but 

 frequently bent and bisected; more often bent than in 

 C. longifolium, though less often than C. moorei. Double 

 figures are more numerous than in C. longifolium, but 

 less numerous than in C. moorei. 



The degree of polarization is high to very high (value 

 85). The 'polarization of the individual grains has the 

 same range as in both parents, but a larger proportion 

 of the high to very high are found than in C. longifolium, 

 making the mean polarization slightly higher than in 

 C. longifolium, but about the same as in C. moorei. A 

 variation in the polarization is moderately often found 

 in the same aspect of a given grain, not so frequently 

 as in C. longifolium , but about the same as in 0. moorei. 



With selenite the quadrants are usually well denned, 

 unequal in size, and often irregular in shape. They are 

 more sharply defined and less regular in shape than in 



C. longifolium, but slightly less sharply defined and with 

 about the same irregularity as in C. moorei. The colors 

 arc usually pure, the yellow is less often pure than the 

 blue, and the impurity of color is indicated in a few 

 grains by a greenish tint to both colors. The colors 

 are more often pure than in C. longifolium, and almost 

 the same, but witli a little more impurity due to a green- 

 ish tinge, than in C. moorei. The polariscopie proper- 

 ties without and with selenite are more closely related 

 to those of C. moorei than to 0. longifolium. 



Iodine Reactions. 

 With 0.25 Lugol's solution the grains immediately 

 color a light to moderate blue-violet (value 47), which 

 is a little deeper and more blue than in C. longifolium, 

 and the mean of the majority of grains slightly lighter 

 than in C. moorei. The color deepens rapidly, with 

 greater variation among the grains than in either parent, 

 the mean being a little deeper than C. longifolium, but 

 lighter than in C. moorei. With 0.125 Lugol's solution 

 the grains color a very light violet, which deepens some- 

 what rapidly, becoming more bluish, the grains varying 

 in depth of color from light to moderately deep, a little 

 deeper than in C. longifolium, but somewhat lighter 

 than C. moorei; and with greater variation in depth than 

 in either parent. After heating in water until the 

 grains are gelatinized and then adding a 2 per cent 

 Lugol's solution, the grains color a moderate indigo- 

 blue, some with reddish tint, and the solution a moder- 

 ately deep indigo-blue. The blue grains are more uni- 

 form in tint, and the mean coloration is a little deeper 

 than in C. longifolium. Some have a reddish tint which 

 w r as not noted in C. longifolium. The blue grains are a 

 little lighter in color and more of the grains have a 

 reddish tint than in C. moorei. If the preparation is 

 boiled for 2 minutes, and then treated with an excess of 

 2 per cent Lugol's solution, the grain-residues color a 

 very light blue with reddish tint, the capsules a light 

 old-rose to wine-red, and the solution a deep indigo-blue. 

 The grain-residxies are lighter blue and more reddish, and 

 the mean of the color of the capsule is lighter and more 

 reddish than in C. longifolium, while both are slightly 

 lighter than in C. moorei. In these reactions the closer 

 relationship to C. moorei is manifest. 



Aniline Reactions. 



With gentian violet the grains color lightly at once 

 and in half an hour they are colored moderate to moder- 

 ately deep, there being more of the latter coloration than 

 in either parent, the mean being deeper than in C. longi- 

 folium and the same as that in C. moorei (value 65). 

 The body of the grain tends to color more deeply than 

 the lustrous band which is located at the distal margin 

 or which forms a marginal border around entire grain. 

 A narrow band of deeper color is occasionally found about 

 the middle or nearer the distal margin which probably 

 represents the band of coarser lamellae sometimes located 

 at this point. The same peculiarities were also noted 

 in both parents. 



With safranin the grains stain lightly at once, and in 

 half an hour they are colored moderately deep to deep. 

 The coloration is deeper and with a slightly different tint 

 of red than in C. longifolium, but of the same depth and 

 tint as in C. moorei (value 65). The same tendency 

 for the body of the grain to color more deeply than the 



