Some type of geranium?

My first thought was Aconitum carmichaelii - Monkshood.

Yeah, could be aconitum. If it is, it's a leggy one...

Yes monkshood that name sounds familiar. A quick google has me worried... should I trash this plant? Too dangerous for a home garden?

No mattp, it is only toxic if ingested. I have grown various Aconitum for years and even stabbed myself on a dried stalk with no ill effect. They are marvelous plants and for me doubly because deer ignore them.

Actually the plant is dangerous without ingestion - the toxins can be absorbed though the skin. Always wear gloves when cutting or dividing it.

Two friends who are professional designers have permanent nerve damage in their hands from dividing Aconitum rhizomes. No kidding.

It’s going in the trash. Not worth it. Not because I’m afraid, but for others (pets, non-gardeners) who might come across it on my property in the future.

thanks all