It's fairly large and I have no idea what it is.

Here's photos:
Pic: Flower cluster, white.

It has large palmate leaves on single stems all growing up from the root, and white flowers in clusters. It's about 1 m (3') tall.

I have no idea what it is; it was labelled "Glaucidium palmatum" in the botanical garden of Gothenburg, but it's completely different from that plant.

Any of you have a clue?

Update: it's Diphylleia cymosa.