Mandevilla
It is a little known fact among gardeners that this plant is actually propagated from the toe nail cuttings of Peter Mandelson. This plant was originally grown in 1953, but seemed to be a less than strong specimen at that time, however a moderate amount of growth over the years seemed to indicate that the plant might be worth further horticultural interest and investment.
After intense cultivation by Blairidii Antonidicus, the initially seemingly unpromising Mandelson plant, did start to make some progress. Of course, a lot of organic matter was needed, mainly large quantities of bullshit. This did indeed stimulate growth, and for a while the plant did seem as if it might make some sort of contribution to mixed beds and borders, but would most likely need staking to maintain an upright habit and prevent drooping onto nearby plants.
There is also a bearded variety available, however it has been reported that this is particularly unreliable with regard to flowering times, and may therefore leave a gap in ones border.