Pretty sure this is London Rocket, Sisymbrium irio, but checking before I post it in the database, because there are no other pix.

2-3 feet tall, soft, herbaceous, green scent sort of like dandelions

It's on the non-native invasive plant list in Arizona, considered undesirable and a major problem in commercial lettuce fields.
https://extension.arizona.edu/...

Thank you Ms Doe, I hadn't seen that. This stuff has invaded my yard this year like never before. I was actually considering turning an area into a small wildflower patch to accommodate it and other volunteers. Rethinking that idea now...

wow, grab it now!!

I have been a round or two with other "hm, that's interesting' volunteers that turned out to be wolfs in sheep's clothing!

Yes, before even one seed matures!