I.D. of Woody Perennial
I'm no expert, but I know a lot of plants and can recognize a lot of plants. But this one, I have absolutely no clue - like I don't have an inkling. It's a woody perennial and is growing well in a shady spot that gets good morning sun. There is an astilbe to the left, so that's what you see to the left and at the bottom. I'm asking about the one with the yellow flowers. It was my mom's, but she has no clue either.
Any ideas? I'm sure someone will know.
Thank you in advance,