Hi!!
I just found your post, while looking up Doug Fir properties...and then searching for Mana, which was named in the pfaf.org entry for Doug Fir.
I made a syrup last year by surrounding the cones in sugar and letting them all sit in a jar in the (occaisional) sun for months (coconut sugar way better than brown sugar)...but I digress...
Anyway, I then found this link, and thought I'd share it with you:
https://extension.usu.edu/forestry/files/publications/utah-forest-facts/018-native-american-uses-of-utah-forest-trees.pdf
