I am not sure where this is from (probably Martha...), but I love love love it - every single one of these.
Vibrant and cheerful fresh citrus dotted with petite and fragrant stephenotis blossoms (plus a few glossy green leaves) has always been one of my favorite combinations for centerpieces - like the top right picture. As for flowers - I am huge into gobs of texture (like the bottom right photo) - this is such a fresh take on an otherwise traditional arrangement.
The bold yet soft orange is so crisp against the clean white backgrounds, vessels, and cakes in these set ups. This is definitely leaves me feeling inspired!