US Dept of Agriculture's $0.15 Fee on Fresh Cut Trees

To pay for the new Federal Christmas tree image improvement and marketing program, the Department of Agriculture imposed a 15-cent fee on all sales of fresh Christmas trees by sellers of more than 500 trees per year (7 CFR 1214.52). And, of course, the Christmas tree sellers are free to pass along the 15-cent Federal fee to consumers who buy their Christmas trees.

Also, according to the article, the tree growers are all for it.