Asking from New Jersey. I have a couple of these little flowering plants growing in my front yard, one in a small area surrounded by stargazer lilies and another across the yard between some ivy and a tree. The flowers just opened up within the last few days (the lilies haven't opened yet). The leaves look similar to the lily leaves, so much so that I thought it was another, smaller lily until it grew that curled-over bud cluster. It's about 12 inches tall.
Here are pictures, some of the plant in its normal curled-over state (the surrounding, taller plant leaves are from stargazer lilies), and one with me holding up the flowers to get a picture. EDIT: I added a couple pictures from other angles.