This is the first of a few I am trying to identify. We recently purchased a house, and the previous owner was an avid gardener. As the weather SLOWLY and painfully warms up here in Seattle I keep having new little treasures pop up. This first one is a tiny iris like plant/
grows in full sun
approx 2" tall
If they're miniature bearded irises, you should see small rhizomes like regular bearded irises make. If you'll uneather the rhizome a bit, that might prove that it's a mini iris. I have some that only get about 4-6 inches tall and I love them. But they're like regular bearded irises and don't like to have the rhizomes covered. So if that's what they are, you'll need to uncover the rhizomes to prevent rot.
It could still be a Sisyrinchium. S. californicum would be native for the area and the foliage looks very much like the S. californicum, Yellowstone, that I have in my garden. Mine has just finished it's spring bloom but if this is not solved I will get out and take a photo when the rain stops.