Orchid

I like this shot! You were successful with the low key approach.
My wife has about 200 orchids so I always seem to have one that is blooming to shoot.

Lovely tonality and nice soft light, but I don't think this is a what is typically called a "low key" shot. It is a light colored flower against a dark background. A low key shot, would be a dark colored flower against a dark background (black on black), or at least clearly directional lighting causing sharp distinction between shadow and light parts of the subject, and small lighted parts. See some of the examples here:

http://www.diyphotography.net/lighting-high-key-and-low-key

Thanks for your comments. Thank you Marco for the link and clearing up difference in techniques.