A couple of IDs please


I’d like to get both these plants, if they are suitable for my garden, so could do with IDs
first one growing along a riverbank, looks like a variegated iris, though the stripeyness hasn’t come out well on the pic, but the flower isn’t an iris type flower is it? Maybe the flower doesn’t belong to the iris type foliage?
Second one, 1m tall very grey/blue colour grass (I think), but maybe could be a bulb?
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Leymus arenarius is a very blue grass but not one I know well enough to ID with confidence
Is the grass likely to be leymus given it’s in a mixed border, ie improved soil, mulched etc. The leymus looks like a sand dune grass.