This is a message for my new friend Betsy since I couldn't find any other way to write to you directly.  Thanks for the response and the extensive research you put into answering my question.  I knew you wouldn't let me down.  When I think back about a week ago as I was cutting down that mango tree and  goop was pouring out of the limbs like blood, I remember saying to my co-worker , "I hope this stuff isn't poisonous."  Well it was.  By the way, I just realized you and Jim are a married couple and also own the website.  I never thought I cared about learning more on poison oak, ivy, or sumac , but for some strange reason I love the site and honestly checked about 5 times today to see if you wrote back.  Actually my roommate asked me today how I knew so much about my poison oak.  I give all credit to Jim and Betsy and there random site I found on google.com.  Well I am gonna itch for another 20 minutes and then go to bed.  Thanks again.  Oh yeah Jim, you know all the answers too.