SPECIES CROSSES IN THE GENUS NICOTIAN A. 



215 



be a simple factor of dwarfness (or absence of tallness), since 

 dwarf plants with bulged corollas were seen in F 2 from a 

 cross between E and a tall variety having bulged corollas, 

 whilst the particular form of corolla imder discussion never 



appeared upon a tall plant. On this supposition funnel- 

 shape and dwarfness are separate recessive allelomorphs. 

 .The bulged character was never seen to arise among the 

 offspring of exclusively funnel-shaped parents. 



Table V. 



Langsdorfli Crosses — Shape of Flowers. 



b = bulged corolla. f = funnel-shaped corolla. 



? includes one or more specimen-s of type E. 



