270 



Shull. 



the characteristics of distinct liereditary lines, is uot yet known. Over 

 150 specimens with the virescent lines on the petals were noted in 

 27 families wliich together included 664 nari'ow-leafed individuals, i.e., 

 more than 23 per cent of the narrow-leafed plants in these families 

 were modified in tliis way. No attempt was made to be exhaustive in 

 the records of this characteristic, and there is no doubt that a few other 

 individuals in these families showed traces of the same al)normality, but 

 the number recorded will give a fairly accurate idea of the prevalence 



Length of bristle in anguslifolia males. 



1-5 

 1-6 

 1-7 

 1-8 

 1-9 

 20 

 2-1 

 2-2 

 2-3 

 2-4 



1 2 12 16 3 4 



1 2 1 = .3.3 



Fig. 3. Correlation -table showing the relations of the average lengths of the rudimentary 



ovaries in the males of Lychnis dioica anguslifolia, to their average lengths in the 



males of typical Lychnis dioica belonging to the same families. Coefficient of correlation 



— 0-024 ± OMIT. 



of this type of variation in the nari'ow- leafed ])lants. I have uot yet 

 noticed a similar abnormality in any of my many thousand broad- 

 leafed plants. 



With regard to the sex-organs tliere is little that can l)e said at 

 present, as only males of august /folia have been available for study. 

 These show no very striking departures from the males of the broad- 

 leafed plants, except in the length of the delicate bristle-like rudimen- 

 tary ovary, wliich occurs almost without exception, in the center of 

 every male flower of Lychnis dioica. Tiie lengtii of tills "Ijristle" has 



