Wow. Thanks for the positive feedback everyone. I used a Sony dsc f717 with the macro setting for the echinacea flower and a 100 mm prime on an Eos Elan body for the second one.
For the first one I could have captured the entire flower but I would have lost some detail from the center. Since the pattern was very striking I felt it was worth it to crop out some of the petals. Regarding the composition, well I wish I could take credit for that but it was probably due to the wind or something. I've shot more pictures of half flowers because the wind pushed my subject out of the frame. Thanks again for your comments.