Recently Les Jefferson from Harvey Bay hybridised a Passiflora quadrangularis with a Passiflora alata. He used pollen from the Granadilla to get his P. alata to set fruit, which was self infertile. He sent me seed of the resulting cross which I grew on and the picture is the resulting fruit. Smaller in size than the Giant Granadilla but with a very nice sweet flavour similar to the P. alata. Has anyone else tried to hybridise other passionfruit?