Soundboard identification!
Instruments- discuss specific features, luthiers, instrument problems & questions
I don't disagree, but I say it's impossible to tell from a photo, even if it were a professional one. I work sassafras albidum nearly every day, it's one of the staples in my shop. It's heavy, only slightly lighter than black cherry (31 lbs per cubic foot, to 35 for cherry). The pore structure, as usual, is the key to positive identification, and if you're a science type person you'll like to see http://www.sciencedirect.com/science/article/pii/S0141635903000771
If you want, send me your address and I'll mail you a little scrap of S. albidum, so you can compare it yourself.