This little beauty is the Everlasting Pea (Lathyrus grandifloras) which is a contradiction in terms. It isn't everlasting and it isn't a pea - I suppose what is means is that it is perennial and from the pea family. I have this growing along the picket fence at the front of the house. The colour ranges from very pale pink to dark pink - the picture shows the mid-pink colour. It is a herbaceous tendril climber with unwinged stems and neat racemes of flowers in summer. It has gradually seeded itself right along the fence and I have to be quite brutal cutting is back as it threatens to attack any passer-by. Unfortunately it has no scent, but it is so proliferate that you can forgive it for that.