Variegated Leaves. 



289 



stance, the highest numbers (not to mention the numer- 

 ous smaller ones) that I found amongst the seedlings of 

 individual seed-parents were as folows : 



YELLOW OR WHITE SEEDLINGS 



Aiilirrhinuin viajiis 5-6 % 



Clarkia pulchella 9-13 " 



Papaver Rhoeas 15-30 " 



Polygonum Fagopyruin 8-12 " 



Scrophularia nodosa 10-15 " 



Trifolium incarnafnin 4-6 ' ' 



Chrysanthenimn segetuvi 13 " 



Lijiaria vulgaris 25 " 



Trifolimn pi'atejise 13 " 



Oenothera Latnarckiana 20 " 



In many other species I have, as yet, found not more 

 than one or two per cent of yellow seedlings from the 

 seeds of individual parents. Therefore I presume that 

 this extreme variation is 

 brought about, besides by 

 the heritable potentiality, 

 by causes similar to those 

 in operation amongst the 

 variants in the small 

 seeds of Trifolhun incar- 

 natuiJi (p. 239). 



In some cases, as for 

 instance Polygonum Fa- 

 gopyruin and Trifolium 

 incarnatum it struck me 

 that the higher numbers 

 were more frequent than 

 some of the lower ones. 

 This was especially the 

 case in Papaver rupifragum, amongst the offspring of a 

 single parent plant. This plant was selected as l)cing a 



0.1. 3 6 9 12 15 18 21 24 



Fig. 55. Papaver rupifragum. Pro- 

 portion of yellow seedlings among 

 the seeds of 54 green plants. These 

 plants themselves were the off- 

 spring of a single green parent 

 plant. The two first ordinatcs 

 are slightly reduced. The figures 

 3, 6, 9, etc.. signify 2-4, 5-7, 8-10% 

 yellow seedlings and so forth. 



