hey there,
This is mostly photoshop work, though the parchment is actually tea-ed paper that is baked in an oven after i had beaten it up. The heat browns and stains the paper, and then i scanned that in. I did the line work for the coast and all that and scanned that in and photoshoped all of the color.
I have my own forest brushes that i have made, both for the trunks and the leaves and i vary them for variety. Custom brushes are the key to map-making i have found...
Thanks for your replies and input everyone!