Pretty. Great rock.

This looks like iris pallida. I like them a lot. In my garden they grow very tall and are very reliable. It's getting warmer here in Central Europe (53 F today), even though we really had no winter at all this year. We still get night frezes, last night was 21 F but we expect 30s at nights in the coming week. My iris pallida have leaves almost up to my knees by now but obviously no flower stalks in sight.

Very pretty clump! Yes, we still have snow cover here, so thanks for the picture :)

Shadow