I. Inheritance in Shirleij Poppy 



67 



and (ii) that thi.s socd niore readily gcrminatos. On the vvholo thcro is ovidence 

 enoiigh in i'avoiir of tlicse principles f'rom tlic band .serics to niaki^ it desirable 

 that experirneuts directly bearing on these point.s should bi: institiited next yoar. 



(5) Ilomotyposis. We have now oiglit ca.ses o( lionuityposis vvorkod ont for 

 Shirley Poppie.s. The re.sults obtained show a very considcrable Variation in the 

 homotypic constant, and it is undoubtedly affectcd by the enviroutnent and 

 treatment of the crop. Chelsea II was such a faihire that iio fiirther constants 

 were determined for it. The Higligate crop had very rarely two fruits to the plant 

 and so homotyposis could not be dealt with. Both the Bookham and the Crockham 

 crops were gathered as plants whieb were tied into bundles for each series, the 

 otlier crops having the fruits collectcd oti' each individual plant into separate 

 receptacles. Thus in the former crops all the capsules from the same series, but 

 possibly not all the capsules from the same plant, have been grouped together. 

 This would to some extent aftect the homotyposis of these series*. The Chelsea I 

 crop suffered, as has been elsewhere recorded, much from selection after gathering 

 and the Enfield II crop was a remarkably poor one, having on the average ouly 2 

 to 3 capsules per plaut. The general results are given iu Table IV. 



TABLE IV. 



Homoti/posis in Bhirley Poppy. 



Now it will be seen at ouce from this table that the mag-nitude of the 

 homotyposis is not related at all or uot in any simple manner to number of plants, 

 number of capsules, number of pairs, or to average number of capsules per plant 

 used in its determination. Nor does a high or low variability seem significant for 

 changes in the homotypic correlation. On the other band the four crops with 



* G. U. Yule writes : "The plants were sometimes broken, tlius capsules belonging to the same 

 poppy may be scparateil, but capsules entered between bars ccrtainly belong to the same plant." 

 I.e. one broken plant migbt occasionally be counted as two plants. 



t The Bookham homotyposis is unsatisfactory ; the record of capsules from the same pareutage was 

 satisfactory, but that of capsules from the same plant was very defective, as a rule only 1 to 3 capsules 

 were recorded as certainly from same plaut, but two plants haJ between 30 and 40 capsules, and these 

 had to be omitted, or they would have given rise to one-third the total nirmber of pairs. 



9—2 



