86 



Sudden Appearance and Constancy. 



Another interesting^' constant variety is Chelidon'uun 

 ma jus latipetahun. (Fig. 11), for the possession of which 

 I am indebted to Prof. J. W. >\Ioll in Groningen. It 

 differs from C. inajus in its petals which are so broad 

 that their edges overlap so that they form an unbroken 



Fig. 10. Madia clcgans. 



Fig. II. A, B, Chclidonium ma jus 

 latipctalum. C, D, CJiclido)iium 

 niajus. 



crown instead of an open cross. I found it to be con- 

 stant through several generations. 



The constancy of the fasciated variety of Myosofis 

 alpestris; Victoria with its broad, many-petalled central 

 flowers, is likewise well known, as is also that of Linaria 



