Pelargonium papilionaceum meaning butterfly because of its large beautiful & elegant pink flowers that resemble a butterfly in appearance with purple markings in the center.
It grows to about 2 meters with heart shaped shallow lobed leaves that are scented but can have a strong and unpleasant fragrance, although the lovely flowers makes up for this, Each flowering stork contains 5-10 flowers. P. papilionaceum has been grown in cultivation since the 1700s and the leaves are also used as a substitute for tobacco. It is native to areas on the edge of forests in the South Western and Southern Cape.
Pelargonium Species world 
a very beautiful flower, is it hardy?
It is fairly hardy but as it is originally from South Africa it doesnt like too much frost or snow over a long period and may need to be covered in winter if it is planted outside.