338 MR. A. W. SUTTON ON BRASSICA CROSSES. 
intereross when planted in elose association, but looking over the plants 
raised in the last experiment with Professor Percival of University College, 
Reading, we concluded that ће experiment would be far more complete if a 
series of carefully controlled artificial crosses were undertaken in order to 
ascertain whether some of the species or varieties which had not naturally 
intererossed in the previous experiment, might do so when the flowers 
were artificially pollinated. 
The Brassieas selected for this experiment are shown on Plate 26, and 
consist of :— 
Fig. 16. Colza Варе (Brassica campestris, L., var. oleifera, DC.). ВезетЫез 
the Swede in its glaucous leaves, which when young are hispid, 
but its lowers are bright canary-yellow. 
17. Ragged Jack Kale. A plant resembling in general) А 
| um | Flowers 
character the Colza Варе and Asparagus Kale, but . 
. "E | > bright canary- 
with laciniated leaves. "би. . 
, - . 4 | yellow. 
‚ 18. Asparagus Kale closely allied to Сома Rape. j . 
The flowers of these 
three types are 
19. Kohl Rabi (Brassica oleracea, L., eaulo-rapa). > 
| 
* almost alike and 
| 
| 
‚ 20. Thousand-headed Kale (Brassica oleracea, L. 
acephala). 
| . of a pale vellow 
21. Drumhead Cabbage (B. oleracea, L., capitata). pare 3 
colour. 
Swede Turnips, viz. :— 
22. Purple-top Round White-fleshed (Brassica campestris, L., var. Napo- 
brassica communis, DC.). 
Flowers bright canary-colour. 
, 23. Purple-top Round Yellow-fleshed | Brassica campestris, L., var. 
„ 24. " Tankard " Napo-brassica Rutabaga, DC. 
Flowers pale buff-colour. 
Turnips, viz. :— 
treen-top Yellow-fleshed . , 
. G pole ? Drassica Rapa, L. 
-Purple-top Yellow-fleshed 
Flowers pale buff-colour. 
әл 
=' 
-— 
. 
Purple-top White-fleshed 
Green-top White-fleshed 
Flowers bright canary-colour. 
Brassica Rapa, L. 
" 
" 
bo bo 
~] 
. 
From this point I had the advantage of the able assistance of Professor 
Percival, who personaily emasenlated the blooms and applied the desired 
pollen. 
