Large vine with simple oblong leaf. Older plants have a tendency to flower in mass at the base of the plant. Such "terrestrial" flowers never set fruit. Countrywide distribution, but appears to prefer limestone-based soils. Larval foodplant for butterflies.
This is a plant which does everything to live up to the name given to it by the botanists. A large and vigorous climber, it has large, six inch, rounded leaves and large clusters of ridiculously large, green with white or brownish-red markings (but color can be very variable) flowers of the fantastic, Dutchman's pipe shape, each up to 12 ins. in length - and that's a lot of bloom! And that's not all! These are followed by matchingly large seed capsules. A flower arranger's dream, they are about five inches long, big enough almost to be wired for a miniature 40 watt bulb, and, combining suggestions solicited around the office, like a Chinese lantern made of a dried (admittedly only six-legged) octopus skin. A challenge for you and your greenhouse.