INFERTILE HYBRIDS. 193 
In plant LV. the leaves are usually 3-lobed. Perfect 5-lobed leaves 
occur. The flowers bear a very close resemblance to those of the parent. 
The perianth is a little smaller and is poorer in substance. The outer 
coronal rays are almost identical with those of the parent in size and 
colour. The inner rays are a little longer and correspond exactly with 
those of plant IJ. The rays leaning towards the gonophore are, as in 
plant III., abnormally short. The stamens are similar to, and the 
styles identical with, those of the parent. The stigmas, however, are dull 
purple. The section of the flower corresponds with that of the parent. 
Much nectar is secreted. 
This plant has borne fully fertile fruit, clearly the outcome of fertilisa- 
tion by pollen of one of the derivatives of P. alba x P. ‘Constance 
Elliot’ growing near by. 
It is interesting to find that plants grown from cuttings of the original 
plant of P. ‘Constance Elliot’ x P. alba, under the same conditions as 
its seedlings just described, have borne fruit in very considerable numbers, 
the great majority containing seed, and many being quite full of seed. 
In one case a fruit was found to be quite empty save for the presence of 
one perfectly developed seed. There is every reason to believe that the 
setting of the fertile fruit was due to pollination by bees with pollen from 
the derivatives of P. alba x P. ‘Constance Elliot’ referred to below. 
Passiflora alba x P. ‘Constance Elliot.’ 
This reciprocal cross was effected in 1899. A fruit, in this case 
borne by P. alba, contained 200 seeds, but all were poorly developed 
except one. The single seed was sown and it soon germinated. A 
former cross of the same kind yielded a similar result, but the fate of the 
solitary seed then obtained has not been traced. The single seedling was 
strong from the first. It was planted out and grown under identical 
conditions with the plants of the reverse cross described above. It 
showed vigour quite equal to the less luxuriant of those two. It had to 
be confined to a curtain-like mass of 138 square feet. The stem reached 
the circumference of 3% inches. The leaves were a slightly paler green. 
The most distinctive feature, however, was found in the great majority 
of the leaves being 3-lobed (fig. 34 a) instead of 5-lobed. 
The flowers were virtually identical with those of the reciprocal hybrid, 
the only evident distinction being in the colour of the styles, which were 
pale green throughout, with a few faint red spots. The styles of P. alba 
are pale green. The pollen was as inferior as that of the reciprocal 
hybrid. Bees were attracted in numbers to the flowers, but no fruit was 
found on this plant. 
Plants in pot, grown from cuttings taken from the above original 
seedling, have borne many fruits. The first instance was noticed in 1902, 
when a plant bore two fruits. The first to ripen was torn off by some 
thoughtless person. In the remains, eleven fine seeds were found. ‘The 
other fruit, gathered ripe, was 13 inch long and 14 inch in mid- 
section, and rich orange in colour. Its form (fig. 39) was more rounded 
than that of the fertile fruit borne by the reciprocal hybrid described 
above. It contained twenty-three fine seeds. It seems quite certain 
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