4/9 (later addition): a new (to me) flower

I went out to Woolly Hollow after dinner, and I found this kind of flower blooming on the forest floor:

I was especially surprised because I hadn't seen it there last spring.  As I was taking pictures a group of people walked by, and a woman told me she was surprised at seeing the flowers too.  We enthused, and she asked me if I knew what they were called; I didn't.  But I do now:  it's a crested iris.