54 



stem turnip: in fact, the name, kohl rabi, is perhaps a corrup- 

 tion of its scientific name, canla rapa, which means "stem 

 turnip". It is a matter of interest that the two common types 

 of turnips, the white and rutabaga, are both related to the cab- 

 bage group, belonging as they do to separate species of the same 

 genus, Brassica, as also do the several types of Chinese cabbage. 



Fully grown plant of wild cabbage, raised from seed obtained from English 

 sources. Note that it looks like a partially developed plant of the ordinary 

 cabbage, from which it differs in the fact that it never "heads." Courtesy of 

 Dr. J. C. Walker, Bureau of Plant Industry and the University of Wisconsin. 



However, it should be noted that the assumed relation- 

 ship between the cultivated forms themselves, and with the 

 wild type are not based on any absolutely conclusive experi- 

 mental evidence. They are believed to be related because of 

 similarity of flower structure, — they all have the simple, four- 

 petalled, yellow flower, so common among other mustard 

 species, — and because of the close resemblance which young 



