Geranium X Lilac Ice

[John85]

What is the parentage? wallichianum X ?
Could it be that it is the same as Rozanne:himalayense X wallichianum

[Maggi Young]

I have seen this plant listed as  Geranium wallichianum 'Lilac Ice' - and from what I gather it is simply a "sport" from  'Rozanne' - differing only in flower colour 

[John85]

It is  definitively not a true wallichianum but a hybrid as it is sterile.
Does somebody knows who found it?

[Brian Ellis]

I have seen this plant listed as  Geranium wallichianum 'Lilac Ice' - and from what I gather it is simply a "sport" from  'Rozanne' - differing only in flower colour 

Yes that's what Tim says too:
http://www.plantpref.co.uk/all-geraniums/geranium-lilac-ice.html