INFERTILE HYBRIDS. 189 
radiating main veins in all the forms. The leaves of the seed-parent were 
5-lobed, sometimes 7-lobed; those of the pollen-parent were 3-lobed. 
P. ‘Constance Elliot’ is a variety of P. cerulea. The starved specimens 
of the latter have been observed to bear small 3-lobed leaves. 
The hybrid was extremely floriferous. The flower-stalks were 2} to 
3} inches long, and curved upwards so as to place the flowers at an angle 
of about 45° with the horizon. The perianth (fig. 35) was 3} inches in 
diameter. The sepals and petals were white, the outer coronal rays 
white in their basal half and pale purplish-blue in the distal half, 
the central rays white, the anthers well developed, the styles purplish at 
the base and greenish-grey with deep red spots at the dilated extremities, 
the stigmas light greenish-drab. The styles of P, ‘Constance Elliot’ are 
Fic. 35.—FLOWER oF PassiFLorA ‘ CoNSTANCE Exuior’ x P. AnBa. 
Natural S1zeE. 
deep purple. Pollen was present, but in very small quantity, forming a 
very thin orange layer on green ground. The grains lay amongst a sticky 
secretion. Under the microscope they were seen to be deep yellow, and 
they varied very much in size and shape. A few grains, although 
probably deeper yellow than in normal pollen, were so plump and the 
sculpturing so clear as to justify belief in the possibility of their being 
functionally perfect. 
Although the flowers were scentless, they were great favourites with 
both hive- and humble-bees. In the early condition the styles were 
- depressed, and bees, especially humble-bees, passing round the flowers 
must often have effected pollination with pollen of the same or of other 
flowers. In many cases self-pollination would occur when the stigma, as 
it ascended to assume an elevated position, was rubbed at the edge against 
the anther nearest to it. By one means or other great numbers of fruit 
