Unmarked Victorian china dessert plates, blow out or puffy shape leaf border - there's some debate here if this pattern is intended to be African violet leaves rather than a begonia leaf, or what kind of flower it is!.
It looks like RS Prussia to us, Mold 108 (Mary Frank Gaston's book) They're gorgeously hand painted, probably studio work original to these plates, I think. Not signed that I could see.
It's a lot of five matching plates, 6" overall diameter. Condition is very good, no chips or cracks, very little scratching.