J\iricgafcil Lcaz'cs. 



27\ 



of green plants, liowcver, not being larger tlian niigiit 

 as a rule be expected from commercial seeds. For in- 

 stance, StcUaria grauiinca aiirca gave only 28% and Myo- 

 sofis alpcsfris com pacta foliis aiircis only 3% of green 

 seedlings. But even in tliese cultures tbere were no 

 variegated plants. 



Tlie fact tbat tbe anrca varieties give a green extract 

 in alcohol and contain sufficient chlorophyll for their 

 nutrition does not need special mention. 



Fig. 54. Thymus Scrpylluni. The ordinary Thyme; a 

 phmt with a variegated branch H. 



The aurea varieties and the velU^w variegated sorts 

 owe their character to the masking of the green pigmeni 

 by the yellow which is developed in the former case all 

 over the leaf, and in the latter only in certain tracts. 

 The majority of variegated plants arc anal(^gous to those 

 numerous half races which manifest their anomaly ( wliich 

 may be doubling, pitcher formation, tlie production of 



