Really enjoy the way you've created some lost edges toward the middle of the flower, it really lets the detail of the stamen come forward.

I feel like the stem might not be that thick but it could be an artistic choice. I also think there could've been some opportunity to add a bit more shading and hard edges around where the petals overlap to give the flower more dimension.

At the end there I really like how you leaned in to create even more details and the border frame is a really nice finishing touch. Nice work!