 Another large tree commonly found in the forest is the coast Douglas-fir, which has been measured at heights of over 300 feet (91 m). Sitka spruce are plentiful along the coast and are better adapted to salty air than other species. The evergreen hardwood tanoak produces a nut similar to the acorns produced by the related genus Quercus (oak). Both tanoaks and oaks are members of the beech family. Trees such as the Pacific madrone, bigleaf maple, California laurel, and red alder are also widespread throughout the parks.
