CROSSING 27 



climate. Seedsmen may find it necessary when securing enough 

 seeds to supply the demand to buy many lots grown in very 

 different climates. The purchasers may not know where the 

 seeds were grown. The results are often disastrous. Elxamples 

 of this are common among garden seeds. It is also true of several 

 field crops, such as alfalfa, cow peas, Canada peas, corn, special 

 varieties of wheat and others. Dealers should keep records of 



FIG. 19. The modern chrysanthemum is a triumph in plant breeding the blending of 

 two distinct species, both resembling the common or oxeye daisy. (U. S. D. A.) 



where seeds are grown. The purchaser should know the source 

 of the seed before using it. Adaptation to surroundings not only 

 refers to climate but also to the character of soil, fertility, season 

 of growth, tillage and other environment. The gardener who saves 

 seeds from his own garden has all of these elements within his 

 own control. 



Crossing. This is the result of breeding two fixed types of 

 plants or two pure bred animals of different breeds. The Light 

 Brahma may be crossed with the Black Langshan or the Plymouth 



