The lower Rogue passes through the Southern Oregon Coast Range, where forests include Douglas-fir, western hemlock, tanoak, Port Orford cedar, and western redcedar, and at lower elevations Sitka spruce. Coastal forests extending from British Columbia in the north to Oregon (and the Rogue) in the south are some of the most productive in the world. The coastal region, where it has not been altered by humans, abounds with ferns, lichens, mosses, and herbs, as well as conifers.