76 



STUDIES IJJ INDIAN TOBACCOS. 



Table 



Length of the Decurrent 



Length of the DecuiTont Portion of the Lamina 

 in Millimetres. 



123456789 10 



49 — — 1 — 16 1 11 10 1 14 



46 — — 2 30 2 10 19 — 15 6 



— — 7 8 11 18 14 15 8 7 4 



— — — — — 1 1 9 12 15 15 



— — — 2 1 12 22 28 15 7 4 



— — — — — — — — 2 11 11 



__________ 1 



— — — — — — 1 1 1 4 3 



_________ 1 1 6 



_ ^ _ _ 2 12 



Fj Type 9 x Type 51 745 

 FjTypeO < Type 51 738 

 F, Type 9 x Type 51 



738-19 

 738-76 

 738-15 

 738-81 

 738-58 

 694- 1 



Type 23 

 F, Type 23 



Type 38 



F3 T>-pe 16 X Type 35 



or there may be two factors of .5 and .7 cm. with a combination 

 of 1.2 cm. It will be seen from the graphic representations 

 (Plate XIV) that 738-81 with a mode at 1.1cm. is most probably 

 uniform, and culture 15 with a mode at .7 cm. possibly so. The 

 number of plants with non-decurrent leaves in culture 738-19 gives 

 a ratio, total plants : those with non-decurrent leaves, 15:1, which 

 would also indicate the existence of two factors. Further 

 observations will be made on this point, but on account of the 

 small size, the difficulties of measurement and interpretation are 

 very great. Culture 694 must be considered next. This culture 

 has never given any plants with non-decurrent leaves. Two 

 cultures appear to be uniform, 694-1 with an average length 

 of the decurrent portion of 1.8 cm., and 694-23 with an average 

 of 4.0 cm. The detailed measurements of the culture 694-1 

 are also given in Table XIV, and show by their range that 

 this cannot possibly be identical with the combination of factors 

 in the culture 738. As the parent plant of 694-23 was the 

 plant with the longest and that of 694-1 the plant with the 

 shortest decurrent portion in the Fg culture 694, it is probable 

 that 4.0 cm. the mean value of 694-23 represents the 

 combination of the factor or factors of 694-1 with another or 

 others. The existence of at least three or four factors which 



