34 
tures in New York, was seen to agree in stature and habit with 
the individuals grown in the le locality at Amsterdam. 
Only about half ce erry could be brought into bloom 
of the plant in deVries’ cultures. The constancy of the species 
also extends to its variability as to the forms of the leaves, an 
attribute also previously recognized. 
Fic. 12, One of the lypes (No. 2.32) of the hybrid between Lamarck’s evening: 
primrose and the common evening-primro: 
The results of the statistical studies show that some of the 
unit-characters of the mutants show a much greater variability 
than the corresponding features of the parent-form, and the 
greater amplitude of the fluctuations is coupled with a decreased 
correlation. Thus the coefficient of variability of the height of 
