Thanks for the id. I did look briefly at that in one book, but
discounted it because the monkshood seemed to have this distinct
separation between the flower parts, and the one I saw seemed
all of a piece; and this may be due to how early in the unfolding
process the flower I saw was. I get fooled often by forgetting
this variable of the developmental stage, like the time I posted
a picture of a monarda after all the actual flowers had fallen
off.

Thanks again!

-David