Brassica Crosses. 



As regards typical Kohl Rabi plants there were 



Found (195 plants). Expected (from 196 plants). 



Kohl Rabi 46 49 



Not Kohl Rabi .. 149 147 



c? ? 



Thousand-headed Kale on Drumhead Cabbage (figs. 96 & 97). 



The plants of F 1 resembled a coarse-leaved Thousand-headed Kale with little 

 or no trace of the Cabbage parent. (No photo.) 

 In F 2, 204 plants were raised (figs. 98, 99, & 100). Of these : 

 Fig. 98. 176 resembled a dwarf type of Thousand-headed Kale with leaves 



broader than usual and fewer branches. 

 99. 26 resembled the Cabbage. 

 100. 2 plants were much like Brussels Sprouts. 

 A few plants in F 2 had purple leaves. 



Swede (purple top, on Asparagus Kale (fig. 102). 



yellow-fleshed, PI. 12, fig. 101) 



The plants of F 1 had foliage like Asparagus Kale and somewhat thickened 

 stems (fig. 103). 



208 plants of the F 2 generation were raised (figs. 104, 105, 106, & 107). Of 

 these : 



178 were more or less " bulbed," 112 having Swede foliage. (Fig. 104) 



66 Asparagus Kale foliage. ( ,, 105) 



30 were bulbless, 14 ,, Swede foliage. ( 106) 



16 ,, Asparagus Kale foliage. ( ,, 107) 



Assuming that " bulbing " and " Swede foliage " were the dominant characters, 

 the expected results would be 



156 bulbed 117 bulbed with Swede foliage. 



39 ,, Asparagus Kale foliage. 



52 bulbless 39 bulbless with Swede foliage. 



13 Asparagus Kale foliage. 



N.B. The foliage of Asparagus Kale always dies off in the winter (see figs. 

 105 & 107). 



CONCLUSIONS. 



1. The races and varieties of Brassica oleracea, L., such as Cabbages, Kohl Rabi, 

 and Thousand-headed Kale, cross readily, the resulting plants being of non- 

 descript mongrel character, unlike the parents. It would appear that the 

 special forms as at present met with in gardens are more the result of continued 

 selection rather than the direct product of crossing. 



