I have Monkshood too -- it's a dark purple one!! It's about the last thing to bloom in my garden. I dont have a picture of it blooming but I have a picture of it thriving in the garden in early September. See the attached garden shot and click on it to open -- see in the bottom left hand corner a portion of that tall "bush-like" plant? That is the Monkshood. (I really need to move it cause it blocks my garden view -- LOL!!!
I also have Turtlehead -- a pink one -- it grows great in dappled sun and bloom late as well. Have it right mixed in with the Hostas.