146 LUTHER BURBANK 



The colors of the new flowers are all conspicu- 

 ously brightened. The striping is usually crim- 

 son on white, crimson on yellow, or yellow on 

 crimson. In addition to presenting these stripes, 

 which are quite unlike any marking of the other 

 Tigridias, the hybrid flowers generally retain the 

 dotting at the center that characterizes the tribe 

 in its original form. But these dottings are 

 greatly increased in size. In some instances, on 

 the other hand, the dottings are partially or 

 entirely eliminated. 



The original types of these very striking new 

 forms of tiger flower were readily fixed so that 

 they breed quite true from the seed. 



The hybrid plants thus perfected exceed 

 greatly the size of any plants that could 

 have been developed by mere selection without 

 crossing. 



The new tiger plants, although still lacking 

 something of hardiness, were greatly improved 

 in this regard over their ancestors, as most of 

 the old Tigridias are quite subject to insects and 

 disease. The hybrid forms are much more re- 

 sistant. There is also a greater power on the 

 part of the new plants to stand sunshine. The 

 old Tigridias sometimes withered under the in- 

 fluence of the sun. This might not at first 

 thought be expected of a tropical plant, but it 



