The shot comes off looking very flat in an unappealing way to me. Also, the stem on the right is too dominant, taking focus away from the bloom. Speaking of focus, the shot seems oof to me, it certainly doesn't pop.
You're lacking a lot of sharpness and focus. The angle isn't my favorite either. the composition sort of works, but the dead leaves in the background aren't very complimentary.
I wish you had gotten right down in the face of the beautiful trillium (haven't seen one in years!!) if you had used a f-stop of 5 or lower you could have gotten that wonderful ooey gooey background...in this the BG is fighting for my attention