I'm not entirely sure what plant this was but I thought it looked sort of cool. From the Philadelphia Flower Show on 3-9-2013.
Shot with the Nikon D7000 and Nikon 28-70mm F2.8 AFS lens @ 70mm. Aperture priority mode F7.1, ISO 400, matrix metering. Nikon SB900 Speedlight on camera in TTL FP BL mode with large-sized Rogue Flashbender and diffusion panel attached.