This is Dwarf Crested Iris (Iris cristata). It is native to this area.
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Dwarf Crested Iris have really short stems, only one or two inches. It is three or four inches tall to the top of the flower. It has a faint fragrance.
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This is the most common color, but I have seen them darker purple or paler, almost blue or nearly white. I’ve been told they can be pink, too, but I’ve never seen it.
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You can find this in the meadow areas up in the forest.
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These were on the side of the gravel road that connects Mills River Recreation Area with the Blue Ridge Parkway.
They sell Dwarf Crested Iris and hybrid variations.