1919] 



Frost: Mutation in Matthiola 



93 



Table 5 



Cultures of 1908. Time from sowing to emergence of corolla of earliest flower 

 of primary cluster. Frequency distributions.'^ 



" Daggers (t) indicate the position and number of apparent mutants. Double 

 daggers (t) indicate inheritance of parental type (here, early); all single progeny 

 of WG9-C10 here reported have been tested for inheritance of this type. The 

 conventional statistical constants corresponding to the house totals of tables 5 

 and 6 have been published (Frost, 1911); the means for flowering given there 

 are too high by one half -day. 



"To time of observation (upper limit of one-day class). 



