36 MUTATIONS, VARIATIONS, AND RELATIONSHIPS OF THE) OENOTHERAS. 



The coefficients of correlation are as follows : 



Length of 

 Length of 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 



ovary 



hypanthium. 



ovary 



cone 



ovary 



of ovary. . . 

 hypanthium. . . 



cone 



hypanthium . . 

 of hypanthium 



cone 



of cone 



of ovary 



of hypanthium 



of ovary 



of cone 



of hypanthium 

 of cone 



a 



!~ O 



- o 



) 



) 



r o 



r o 



42i±o. 



563 ±o. 



477±o 



564±o. 



i57±o, 



873±o, 



558±o 



65i±o 



5i8±o 



044,0. 

 0370. 

 052 o. 

 0370. 

 052 o. 

 0130. 

 037,0. 

 031 o. 

 0390. 



387±o 

 634±o 

 600 ±0 

 580 ±0 

 044 ±0 

 785±o 

 573±o 

 569 ±0 

 532±o 



.0450 

 .032 o 



.0340 

 ■0350 

 • 0530 



.020 o 

 .036 o 



.0360 



I 



.038;o 



472±o 

 572±o 



272±0, 



535±o, 



i33±o. 



829±o, 



556±o. 



59i±o 



500 ±0 



041 o 



i 



0360 



049 o 



I 

 0380 



052 o 



i 



017 o 



1 



i 



o37iO 

 0350 

 040 o 



298^0.049 

 598±o.o34 

 .596±o.o34 

 375±o.046 

 oi9±o.o5i 

 835±o.oi6 

 703±o.o27 

 631 ±0.032 

 ,7i7±o.026 



Length of 

 Length of 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Length of 

 Length of 

 Thickness 

 Length of 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 

 Thickness 



ovary 



hypanthium . 



ovary . 

 cone . . 



/ 



ovary 



of ovary 



hypanthium. . . 



cone 



hypanthium . . . 

 of hypanthium . 



cone 



of cone 



of ovary 



of hypanthium . 



of ovary 



of cone 



of hypanthium . 

 of cone 



0.22I ±0. 

 0.246±0. 



o. 336 ±0. 

 o.507±o. 

 o.i53±o. 

 o . 840 ± o . 

 o. 5i4±o. 

 o.5oi±o. 

 o.540±o. 



0530 

 052 o 

 0500 



041 o 



I 



055I0 

 o 



016 

 042 

 042 



035 



094±o 



■534±o 

 .636±o 

 527±o 

 .438±o 

 456±o 

 83S±o 

 475 ±0 

 482+0 



0560 

 .051 o 

 .042 o 

 .051 o 



• 0570 

 •0560 



. 021 o 



.0750 

 .054,0 



.624 ±0.043 

 .638±o.o34 

 .357. -to. 050 

 .o25±o.o57 

 .111 ±0.050 

 837±o.oi7 

 .64o±o.o34 

 .584±o.o38 

 .555±o.039 



A comparison of the coefficients of correlation in the characters of the sev- 

 eral mutants with those of the corresponding characters of Oenothera lama)xk- 

 iana shows that in 14 cases out of 27 there is a decrease of correlation in the 

 mutant ; in 1 2 instances there is an increase, and in i the correlation remained 

 the same. These results seem to negative the view that the characters of the 

 Oenothera mutants are generally less closely correlated than those of the parent. 

 However, the differences between the coefficients of the mutants and those 

 of Oenothera lamarckiana are not generally greater than those between the 

 several lots of O. lamarckiana, or between the two lots of 0. riibrinervis, and 

 it is evident that the question is still to be considered undecided, but with 

 the burden of evidence in favor of the view that little or no change takes place 

 in the correlation of parts when mutation changes their proportions. 



