Adonis vernalis
Two views of an early spring non-native flower, one of the center, another an abstract of the petals:
I saw this buttercup relative today at Acton Arborteum, thanks to two volunteers doing a plant survey for a tagging project who told me where to look for it. There were only a couple small patches in bloom, some of them already gone by. It’s small and low to the ground. I hope it spreads, a group of them would make a great image. A much more interesting sight than the snowdrops that were also blooming.
Nature Diary 
Happy spring to you, and happy yellow too.
Thanks, Steve.
Very Nice Tom!
Thanks, Reed!
I’m entirely too impressed with myself. I looked at the first photo and thought, “That looks like a buttercup.” It’s a beautiful, mellow yellow that has that touch of green that’s sometimes present perfectly captured. I have trouble photographing yellow, and especially the buttercups or oxalis, but this is really nice.
That’s what I thought when I found it, and I wasn’t surprised when I found it was in the buttercup family. The reds in yellow flowers tend to oversaturate/overexpose, even in indirect light. Using a favorable white balance helps.
What a vibrant yellow. 🙂
Thanks, David!