Passiflora caerulea, the common passion flower is very popular & widespread in UK and the rest of Europe. It prefers a South facing slightly sheltered dry spot with free-draining soil. It is easy to grow and even if taken back to the ground by a hard frost will usually come back again. Nevertheless it is best to protect it from frost for it's first year. The fruit are inedible when green but they may be eaten when they have ripened and turned orange – though they do not generally taste that great.  They are originate in Brazil. We have them in the garden and they are an impressive sight at this time of the year, well in to December and still in glorious flower this morning and I took this photo just a few minutes ago.