Mystery primula/cortusa

[Giles]

I've had this a couple of years, but it's the first time it has flowered.
From seed labelled P.soongii (don't laugh!).
Dies down to nothing in the winter.
Nodding pink/purple flowers held under the foliage.

[Maggi Young]

A primula rather than a cortusa, I think..... are the anthers fused together in a circle? If not, it is a primula. Colour is more to the purple shade than the pinks I'd expect from kisoana, but it could be that??

Section cortusoides for sure...... I think I've almost got it.....Primula septemloba.... has those downward facing flowers.....

Yes! see Jozef Lemmens pix on Primula World.... http://www.primulaworld.com/PWweb/photogallery.htm 
Pretty close!! Leaves not 100%....
 Hmm, P. geranifolia ? Leaves better but the flowers are saying septemloba!!

[Maggi Young]

 Well, John "Primula" Richards opines that it is likely a P. kisoana