346 MR. A, W. SUTTON ON BRASSICA CROSSES. 
б 9 
Thousand-headed Kale on Drumhead Cabbage (figs. 96 & 97). 
The plants of F 1 resembled а 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. 
А few plants in F 2 had purple leaves. 
d Q 
Swede (purple top, on Asparagus Kale (fig. 102). 
yellow-fleshed, P1. 35. 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 y > 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 nondeseript 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. | 
2. Forms of Brassica oleracea, L. (all of which have smooth glaucous leaves 
in all stages of their growth), did not cross with those of Turnip 
