Thanks everyone for your suggestions. That makes three folks (including the comment on the blog) that believe it to be a Lespedeza, and indeed the flower is similar. I'll look more into that genus.
Quite right about the location. We are in Frederick county Maryland, zone 6, about 20 min South of Gettysburg PA. Thanks, Julia -- Julia Redman _______________________________________________ the OrchidGuide Digest (OGD) orchids@orchidguide.com http://orchidguide.com/mailman/listinfo/orchids_orchidguide.com