@ andrew burchill - sassafras is completely safe. I can’t find the article i have in mind, but essentially the study that said it was carcinogenic was ridiculous. The amount of tea you would have to consume to equal the amount of safrole they gave the test rats its enormous. It was gallons of tea a day for months if i remember correctly. Something you would never be able to consume. Green Dean has a neat article though http://www.eattheweeds.com/sassafras-root-beer-rat-killer/
As for where to find it. It is a very common plant in rich woodlands. Depending where you live of course. Between the leaf shape and the smell from the broken twigs and leaves, its incredibly easy to identify.