 Estimate the contribution of NTFPs to national or regional economies is difficult, broad-based systems for tracking the combined value of the hundreds of products that make up various NTFP industries are lacking.One exception to this is the maple syrup industry, which in 2002 in the US alone yielded worth US$D38.3 million.In temperate forests such as in the US, wild edible mushrooms such as matsutake, medicinal plants such as ginseng, and floral greens such as salal and sword fern are multimillion-dollar industries.