wonderfull! check my gallery

I think its very pretty. :D I love the vines. :) Where to improve? Humm... Perhaps add a bit more shading at the center of the flower & keep in mind where the light is comming from so you know where to add shadows on anything that is overlapping (like leaves & vines & things). If the light is comming from right above whatever flower you're drawing it can seem boring (I have to remind myself of this too on everything I draw XD), so make the light hit the petals from an angle. Also, don't forget highlights or even small water droplets if you're going for the real-look. Flaws also make things look more real like tiny tears in petals or brown spots in the leaves. Its hard to add these things when you want the flower to look perfect, I know, but it will help with the realism. If you're going for a fantasy-like flower you don't have to worry about flaws at all. X3 Shading can still very important for fantasy flowers, but if the flower is supposed to be more illustrative you don't have to always add it. Really, it all depends on your own personal artstyle & how YOU want the flower to look. (Sorry for this long post. O_O I hope I helped you, if even a little bit. :D)

Very nice! ^^ I love the designs on the petals.

I like it!