What flower is this? i have a pink flower that grows at the extremity of...

i have a pink flower that grows at the extremity of a tall(over a foot tall) stem which has no leaves. It seem to just grow overnight solitary lasting a couple days back dying, and it doesnt come up every year but have see it two times in the three years i be living in this house.Its with the sole purpose been a single stem and flower, no others. Also, it grows contained by the shade.
Why is my plant dying?
Answers:    Sounds like one of the "Reserrection" type lilies. Here's a pix of Naked Lady..

These type flowers will distribute their leaves up at a different time to reenergize the bulb below.

http://daviswiki.org/Naked_Lady
Astringent plant, next to bell shaped flowers (8)?
Sounds like what we give the name Rain Lillies.
Why are nearby small green growths on my...