70 STUDIES IN INDIAN TOBACCOS. 



character. The F3 cultures 190, 35, 15, 163 and 9, of Type 

 16 X Type 35 exemplified this. 



The first arrangement in which all the leaves are carried 

 at the base of the plant, and of which Type 9 is a good 

 example, also does not depend on the number of leaves. In 

 the F4 culture 738-96, which bred true to this arrangement, 

 the number of leaves varied from twenty-one to thirty-two, 

 and apparently the plant found no difficulty in crowding 

 these thirt3"-two leaves at the extreme base. The leaves were 

 fairly narrow, otherwise the lower ones would have rapidly 

 died from want of light and air. This rosette arrangement 

 has never been met with in a very tall plant. It appears in 

 plants of medium height (Plate XVI, 694-103-120), but the leaves 

 are not quite so concentrated. The dwarf rosette forms have 

 been bred true, but as yet no taller ones. 



The second group, those plants in which the majority of 

 the leaves are concentrated at the base, is a very variable one 

 and contains a large number of different types which breed 

 true. The difference in these types does not depend on the 

 height, but appears to be influenced by large differences in the 

 number of leaves. The same arrangement with twenty leaves 

 and thirty-three leaves must appear dissimilar. The Fj 

 generation between Type 9 (rosette) and Type 51 (ladder) 

 was of this type. It is interesting to note that in the F;, 

 generation besides rosette and ladder types, two different forms 

 belonging to the second of the above groups have bred true. 

 One with a few leaves at the base but which otherwise 

 resembles the ladder type is shown on Plate XVI, 694-38-72. 

 Another form with a great concentration of leaves at the base, 

 694-23-1, is shown on the same plate. The latter is an excellent 

 type for economic purposes and it is hoped to obtain a useful 

 tobacco from it. The fact that this culture, with such a 

 profitable habit of growth for economic purposes, has been 

 bred from two such useless forms as T^^pe 9 and Type 51 is 

 important. 



