Mystery Flower Does Anyone Recognize This Flower

Annette C
by Annette C
This came up in my garden I have no idea what it is. Any ideas?
I couldn't find a bulb either, it was just a finger width white stalk with a delicate flower on the end. Bloom lasted about a week.
This is the mature blossom.
I found others around my property and tried to transplant them, however all I found was the stem. Presuming that I'd cut the stem off the bulb I tossed it aside, and it bloomed anyway. so I replaced it in the ground .... And this is what I got...
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