188 REPORT OF THE CONFERENCE ON GENETICS. 
Whether similar distinctions would appear if reciprocal crosses were 
made between the purple foxglove and D. lutea I cannot say. Seedlings 
of D. lutea x D. purpurea, from a recent cross, have been grown under 
the same conditions as the latest lot of white foxglove crosses, and they are 
remarkably weak compared with these. 
PASSION-FLOWER HyBrips. 
Passiflora ‘ Constance Elliot’ x P. alba. 
In the report of the first Hybrid Conference* reference is made to a 
hybrid passion-flower having P. ‘Constance Elliot’ as seed-parent and 
P. alba as pollen-parent. It is noted that the single hybrid fruit 
contained 189 good seeds. Of 170 seeds sown, 144 germinated, and about 
50 of the seedlings were kept long enough to show that they were all 
singularly alike in vegetative characters. Two of the plants were planted 
out in a spacious greenhouse. Both plants displayed a very vigorous habit, 
and one of them made quite phenomenal growth. The stem, 11 feet long 
and kept unbranched, measured 5} inches in circumference. It is hard to 
say what space this plant would have covered if it had been allowed to 
grow unpruned. It was necessary to limit its growth to a dense curtain 
of 256 square feet. A notable feature was its tendency to produce suckers 
from below, and these were observed to spring at a surprising distance 
from the base of the stem, in one case 15 feet, and in another 18 feet. 
It does not appear that either parent could approach this hybrid in vigour 
of growth. 
The leaves of the established plants were larger than younger ones 
described at the Hybrid Conference, and the lobes relatively wider. The 
2 ba 
¢ 
Fic. 34.—Lrayes or (a) Passtrnora ALBA x P. ‘Constance Exwiot,’ 
(6) P. ‘Constance Exnior’ x P. arpa. 
great majority were 5-lobed (fig. 34 b). It was usual, however, to find a 
considerable number 3-lobed and also some lop-sided 4-lobed ones. 
Transition from the one form to the other was easy, there being five 
* Journal R.H.S. vol. xxiv. p. 166. 
