16 Jeffrey pine-ponderosa pine-Douglas-fir-California black oak forest Mixed forests of Jeffrey pine, ponderosa pine, and California black oak are common throughout the Sierra Nevada. These stands are maintained by periodic underburning. This fuelbed has not burned for more than 50 years, and has a midstory and understory dominated by shade-tolerant conifers such as white fir, Douglas-fir, and incense cedar. 240,260,340 4 1 150,152,153,154 2 1 3

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