This was a surprise from a seedex... it was supposed to be something radically different, but it was subsequently ID'd as Eritrichium canum, a native of Pakistan and surrounding countries.
Still in their nursery pots:
And in the garden:
It's certainly pretty, in the way of garden forget-me-nots (and I suspect its seeding habit may get to be a bit much too). So far, in the conditions it's in (peat acid bed - the only space I had at the time :rolleyes:), it has not been perennial, but instead reseeds. I will have to try it in rock garden conditions, and see what it does.
It was ID'd as ssp. canum, but I see from the attached that I'll have to look closely at the seeds to see if I can verify that.