amaryllis

pink striped trumpet lily
http://www.stuartxchange.org/Lirio.html

Good point, Hippeastrm reticulatum it is. Thanks Anna.

I vote for Hippeastrm reticulatum, Amaryllis belladonna flowers appear after the leaves have died back, hence the common name "naked lady"

Thanks for the ID monkey-mind and nana-puppet.
I am not sure which: Hippeastrum reticulatum http://houseplantz.net/hippeastrum-retic... or Amaryllis belladonna http://en.wikipedia.org/wiki/Amaryllis

Thanks Daniele.

Beautiful shot!