Is there poision oak in AZ???? Help

[Jame]

HI all - long time HIKEAZ guy, first time forum poster....

Let me preface this with a little background.

#1 -I grew up in AZ and hiked EVERYWHERE in the desert. NEVER have I come across poison oak or anything similar as I made my way through bushes, scrubs, etc...

#2 - I lived in Oregon for 10 years and have seen my fair share of poison oak. I'm very much allergic to it and can recognize it anywhere. I've been plagued by poison oak rashes MANY times.

Before posting any pictures of my rash, I hiked North Mountain in Phoenix 2 weeks ago and got off the beaten path. I was wearing shorts with ankle socks. That night, my legs began to itch. All the classic symptoms of poison oak. The next morning, I would have sworn I walked through a huge pioson oak patch. The front of my legs were riddled with red stringy bumps consistent with poison oak. It looks EXACTLY likle poison oak....The rash broke out and I've been on Predisone since.

My question - WHAT DID I WALK THROUGH AT NORTH MOUNTAIN!!!!?????

Surely there's no posion oak there. What's poisonous out there?

Thoughts anyone?

[Jame]

Since moving here I have had that same thing twice and only in the spring. I have had poison ivy really bad in the past and this was just like it but not as severe.

Was the culprit Fiddleneck?