What great contrast! I love how the black is right up against the white, brings out all that detail in the flowers and the leaves. There's a little much black on the left... maybe if the subject was a little more to the left it would be a little better, but other than that it's a very beautiful image :-)
This is a lovely image with superb detail and sharpness. The lighting is excellent. It does look like it might be sideways. I'm sure it isn't, but did you ever think of turning it 90 degrees just to see how it would look? Just an idea.