This page did it for me.... (scroll to the bottom for the "chart")... my brain hurts now and I think I'll go have a little lie-down....
http://www.laspilitas.com/groups/oa...ornia_oak4.html
Thank you Brian! Great site! You're da bomb! And you're right, the two on the right seem to be Canyon Live Oaks from the descriptions...
Joanie