Help with identification?
Hello. I am trying to identify a very common little wildflower. It grows along streams and in wet places -- I live in Baltimore City and there is a lot of it along Herring Run. It is currently blooming. Yellow flowers with 4 sepals (I think!) 8 petals, numerous stamens, and I believe 8 pistils (these were hard to count, even with my hand lens.) Single flower to a stem, with leaves alternate. The leaves are a bit like small ivy leaves. Largest flower I've seen is about an inch across. I think it might be in the buttercup or rose family. I at first thought it was marsh marigold, but the pix I've looked at for that show 5 petals. I'm hoping that because it is so common, someone here might know what it is! Thanks!