MR. А. W. SUTTON ON BRASSICA CROSSES. 347 
(Brassica Rapa, L.), Swede Turnips (Brasstca campestris, L., var. Napo- 
brassica, DC.), or various kinds of oil-yielding Rapes, all of which have 
hispid leaves when young. 
3. No form of Rape was met with which had smooth leaves. 
4. Rapes, Turnips, and Swedes cross readily with each other. 
The plants obtained by erossing the (hispid green-leaved) Turnip with 
the (hispid glaucous-leaved) Swede proved sterile. 
The Turnip and Swede-Turnip are no doubt specifically distinct. 
Ragged Jack Kale and Asparagus Kale produce fertile crosses with 
Swede. All have hispid glaucous leaves when young. 
5. The so-called “ Hybrid” yellow-fleshed Turnip cannot have been obtained 
by erossing the Swede with the Turnip. 
6. The relationship between the white- and the yellow-fleshed forms, both of 
Turnips and Swedes, is still unsettled. 
7. Several of the erosses and their progeny exhibit simple Mendelian pheno- 
mena, but there are many points connected with the occurrences of new 
features, such as novel colour and altered form of leaf, in the segregates 
of F 2, which are not clearly understood. 
The peculiar and apparently distinct character of “ fleshiness” pos- 
sessed by the seedsmen’s specially selected forms of “roots” is very 
much reduced in the F 1 plants, and its occurrence in these may be 
readily confused with increased vigour of stem. It returns, however, 
in the F 2 generation in increased intensity, but none of these plants 
seem to possess it in the same degree as the original parents of the cross. 
In the crosses where the green Drumhead Cabbage was one of the 
parents, a few plants having purple foliage were met with in the F 2 
generation. 
In preparing this paper for publication in the Society’s Journal, I have 
had the valued help of Professor Percival. 
EXPLANATION OF THE PLATES. 
PLATE 24. 
Fig. 1. Green Kale. Fig.6. Drumhead Field Cabbage. 
2. Variegated Kale. 7. Garden Cabbage. 
3. Thousand-headed Kale. 8. Red Cabbage. 
4, Savoy. 9, Couve Tronchuda. 
5. Brussels Sprouts. 
PLATE 25. 
Fig. 10. A Brussels Sprouts plant with Cabbage head. 
11. A new hardy curled form cf Thousand-headed Kale. 
12. A plant of the habit of Thousand-headed Kale, but having very white and tender 
leaf-stalks of the nature of Couve Tronchuda. 
13. A heading or hearting form of Couve Tronchuda, 
14, True Thousand-headed Kale (for comparison). 
15. True Couve Tronchuda (for comparison). 
