Beginner Gardening: can you identify?, 1 by blmlb

blmlb wrote:
These little flowers were growing in the back corner of my back yard when I bought this house 25+ years ago. Over the years I have dug up the bulbs and transplanted them all over the property. But I don't know what they are. I've only seen them once in 25 years, when I saw them growing in a marshy area alongside a golf course. I suspect they aren't very popular because they only bloom once per year around the 1st of June, and then only for 2 weeks, max.