In terms of the sprites you seen in the actual game, no, they are always flowers :3
But in terms of actual Pokemon Biology, it's pokedex does claim for have buds before the bloom brings flowers. These are buds however, not Budews in that sense. Although, I quite like your thinking with that.
I pretty much got this my working it out , logic and bases it off from what you said,but if it helps, you can look at this page. I'm not sure how much it helps, though.