I find the keys difficult too, most of my ids have to be done from photographs when I get home and I'm usually missing the vital shots of necessary id bits!
The other trouble is for the keys to work properly both flowers and fruit are needed - ok if its a plant you can check at different stages but not good if its a plant found once and not returnable to.....
I'd be totally stumped without this forum and am incredibly thankful for the help and id's given.
