Ah ha, Ron Thanks! I did try pollinating a couple of the flowers on the P.quad last spring with a little paintbrush to no avail. Now, the vine has climbed up into my big stand of bamboo, so most of the flowers are at least 15ft. off the ground. I'll definitely try your pollinating method on any flowers that I see lower down.
I get tons of fruit from the other 'normal' passionvine, the little purple ones. I also share them with my neighbor over the fence since the vine is galloping along the fence between our yards. He gets a lot more fruit than I do because he has a dog that chases away the squirrels and raccoons that eat the fruit on my side. Oh well, I get enough to add to my morning juice for most of the summer, and to perk up the mango sorbet too. Mmmm.
