GABBIELLE L. C. HOWARD. 



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with a long decurrent portion ; No. 159-58 a broad leaf with a 

 short one ; No. 159-11, a leaf with large auricles and a short 

 prolongation of the lamina. 



Further, this character does not appear to be correlated 

 directly with the width of the leaf. 



Measurements were taken in two ways, firstly, by measuring 

 a typical leaf on the living plant ; secondly, by measuring 

 three leaves on the plant when this had been uprooted 

 for the observations on the height and number of leaves. 

 The first method has the advantage that information on the 

 inheritance of this character is available before the seed 

 plants are chosen, the second is less fatiguing and more 

 accurate. A large number of cultures have been examined 

 by both methods and on normal plants either method gives 

 good results. In this character a large amount of variation 

 occurs, particularly in those leaves in which the decurrent 

 portion is long. It is, however, a definitely inheritable 

 character with distinct segregation (see Tables XIII, XV 

 and XV). The approximate mean measurements of all 

 the Indian types is given in Table XII (average of ten 

 plants). It will be seen that the possibilities are numerous. 



Table XII. 



Length of the Decurrent Portion of the Lamina in the Types of N. tabacnm. 



