I get a bit frustrated with the descriptions 'double' 'bomb' etc. In my database at home, and indeed, the database at our botanical garden I am trying to add all the attributes I can (height, foliate, color, bloom time, FORM, et al) and from one nursery and even authoritative book to another a peony will be described as double or bomb, or semi-double. I try to defer to the APS but even between their publications there are differences. I guess it isn't critical just a bit frustrating to a type A OCD data collector.