340 MR. A. W. SUTTON OX BRASSICA CROSSES. 
Group 1.—No seed resulted from the pollination of 
Г Swedes, 
Cabbage Turnips, 
Thousand-headed Kale with < Colza Rape, 
Kohl Rabi | Asparagus Kale, 
L Ragged Jack Kaie, 
or the reverse pollinations. 
In some instances the pollen appeared to act as a stimulus to the growth of 
the pericarp of the fruit, the pods growing to the normal size or even larger, 
but the ovules were abortive. 
Group 11.—То this group belongs the cross 
d 9 d 9 
"ада Vhita- a 
White fleshed on Swede, and its reciprocal Swede on White fleshed 
Turnip Turnip, 
which proved remarkable in many ways. 
When the Swede is fertilized by the Turnip, that is, when the Swede is 
made the seed-bearer, the seeds obtained are abundant. They are large 
black-eoated like those of the typical Swede, and contain embryos which 
grow vigorously into fine healthy plants. 
In the reciprocal eross, that is, where the Turnip is fertilized by Swede 
pollen, the Turnip being the seed-bearer, the seeds produced are rather paler 
in eoat colour than those of the normal Turnip and always smaller and 
shrivelled. Moreover, it is difficult to germinate and rear seedlings from 
them in open ground, though there is little difieulty in doing this with 
the seeds of the reverse cross. 
These points have been tested many times during two seasons, always with 
the same results. 
At first the seeds of the crosses were sown in carefully prepared beds in 
the open ground; and from the fact that no plants were obtained from the 
seeds of the Swede g on Turnip 9 cross, we were inclined to conclude that 
the embryos in the seeds were abortive and incapable of growth. 
However, in 1906 seeds, from reciprocal crossings, were again obtained, 
the same striking differences in size, colour, and shape as were seen in the 
seeds before, but instead of sowing them at once in the open ground they 
were germinated on blotting-paper and the seedlings planted out. Those of 
the Swede d on Turnip 9 were weak, but after careful management 
ultimately grew into plants as large as those from the Turnip ¢ on Swede $ 
eross. Moreover the characters of the full-grown plants proved to be the 
same whichever way the cross was made. 
The general facies of the plants was intermediate between the two parents. 
The leaves were glaucous like Swede leaves, but more hispid and more like 
those of the Turnip in shape. The “bulb” resembled the Swede in form 
