uk.rec.gardening got it -

"The Shoo-fly Plant (Nicandra physaloides), also known as the Apple
of
Peru, is an annual plant native to Peru. It is the only species in
the
genus Nicandra. They are known for their property of repelling
insects.


Plants grow to 1 metre tall and are vigorous with spreading branches
and ovate, mid-green, toothed and waved leaves. The flowers are bell-
shaped and 5 cm or more across, they are pale violet with white
throats, and are produced from July to September.the flower will
become lantern like towards the end of its time, it is a hardy annual
that means it will last one season from seed to seed"


http://en.wikipedia.org/wiki/Nicandra_physaloides


Must have been distributed by birds.


green_light wrote:
Hello,

Can anyone tell me what this plant could be? It self seeded in my
border this year but Ive been unable to find out it's name or
preferred growing conditions etc.

http://www.cobwebcottage.com/index.p...=21&Itemi d=1

Thanks in advance.

G