Sisyrinchium bellum, and isn’t it just? Bellum, that is. Or bellisima. On just about every springtime walk you take in Marin you’ll see these striking dark blue/purple flowers so they are a good one to know. Blue eyed grass are almost always blue, though once, last year, I found a pale morph (photo included below). Though they have five regular petals, they are in the iridaceae family along with iris. I see the similarity most in the way the uppermost leaves form a crisscrossing sheath (or “spathe valve“?) around the bottom of the flower.