The pure white, simple flowers of Natal Plum have a wonderful fragrance, but it does not carry. You have to get in close to get a whiff. All parts of this plant are poisonous, except for the edible fruits, but only after they are ripe. I still haven't tried them--too scared!
The dwarf cultivar, 'Boxwood Beauty', is supposed to be thornless, but I can attest to the fact that it does have thorns, and they are brutal! To read more about this great little shrub, see aprevious post about it.