INFERTILE HYBRIDS. 195 
which 100 were sown, and marked B II. A fruit of C contained 73 
seeds, of which 45 were sown. 
A crowd of seedlings of all three series came up and were grown long 
enough to show that they were all alike in habit and foliage. Five of 
B L.,, four of B I1., and four of C are now in the flowering stage. Those 
that have flowered have proved to be indistinguishable from P. alba in 
every particular. 
To summarise briefly, we find that the pure white species, P. alba, 
crossed with pollen of P. ‘Constance Elliot,’ a pure white variety of 
Fic. 40.—FiLowrerinc SHoot or Srerepiine © or Passrriors aupa x P. ‘ ConsTANCE 
EvuiotT.’ Naturat Size. 
P. cerulea, gave a hybrid in which the blue of the rays of P. cerulea 
reappeared and the size of the flower of the pollen-parent was retained. 
The hybrid crossed with its seed-parent resulted in complete restoration 
of that parent. Seedlings of the parental plant so restored have so far 
bred perfectly true. 
P.‘St. Rule’ (P. alba x P. Buonapartea) pollinated by P. alata. 
It may be of interest to mention another example of infertility in 
passion-flowers. The variety ‘St. Rule’ described in the Hybrid Confer- 
ence Report * was quite self-sterile, the stamens being highly abortive. 
* Journal R.H.S.'vol. xxiv. p. 160. 
