] \irieyated Leaves. 
271 
of green plants, however, not being larger than might 
as a rule be expected from commercial seeds. For in- 
stance, Stellaria graininca aurca gave only 28% and Myo- 
sotis alpcstris coinpacta foliis anrcis only 3% of green 
seedlings. But even in these cultures there were no 
variegated plants. 
The fact that the aurca varieties give a green extract 
in alcohol and contain sufficient chlorophyll for their 
nutrition does not need special mention. 
Fig. 54. Thyinus Scrpylluni. The ordinary Thyme; a 
plant with a variegated branch B. 
The anrea varieties and the yellow variegated sorts 
owe their character to the masking of the green pigment 
by the yellow which is developed in the former case all 
over the leaf, and in the latter onlv in certain tracts. 
* 
The majority of variegated plants are analogous to those 
numerous half races which manifest their anomaly ( which 
may be doubling, pitcher formation, the production of 
