When they heard about Katie Rose, our neighbors came over with these lovely yellow roses cut from their garden.
I photographed the bouquet on a black velvet stage. The roses were both back lit and front lit, and presented a wide dynamic range: when the bright roses at the top of the arrangement was properly exposed, the glass vase was very dark. Exposures that captured the bottom of the arrangement blew out the highlights. So I combined five captures in Photoshop, with exposure times ranging from one to 15 seconds.
[Nikon D300, 18-200mm VR lens at 34mm (51mm in 35mm terms) with image stabilization turned off, five exposures between one and 15 seconds at f/29 and ISO 100, tripod mounted.]