How many ways can you photograph a tulip? Lots.
Wide open aperture to reduce depth of field. Lots of glass hanging of the end of the camera - 105mm macro lens, 1.4X TC, and a close up lens (plus a circular polarizer).
Of the three versions shooting into the tulip thus far, I like this one best. The others were - http://www.pbase.com/ed_k/image/93535556 - and - http://www.pbase.com/ed_k/image/93535940