MUTATIONS, VARIATIONS, AND RELATIONSHIPS OF THE OENOTHERAS. 49 



Fio. 52. Correlation in buds of O. rubri- 

 nervis, No. 04113. Thickness of hypan- 

 thium subject, thickness of bud-cone 

 relative. Coefficient of correlation, 

 0.7170 '0.0259. 



FIG. 53. Correlation in the buds of 

 O. rtibrincrvis. No. 04137. Thickness 

 of hypanthium subject, thickness of 

 bud-cone relative. Coefficient of cor- 

 relation, 0.5397 0.0354. 



FIG. 54. Correlation in the buds of Oenothera gigas. Length of ovary subject, length 

 of hypanthium relative. Coefficient of correlation, 0.6237 i 0.0432. 



FIG. 55. Correlation in the buds of O. gigas. Length of ovary subject, length 

 of bud-cone relative. Coefficient of correlation, 0.5338 0.0506. 



