Turning observations into information for over ten years

By Roger Erismann, Casey Usher Form, Function, and Taxonomy The coast redwood ( Sequoia sempervirens ), also known as California redwood,...

Coast Douglas-fir is one of the tallest tree species on Earth, commonly reaching 200–250 feet in height and 5–6 feet in diameter. Exceptional specimens, such as the Doerner Fir in Oregon, have been measured at over 320 feet. In old-growth forests, these trees often live for 500 to 1,000 years. Young trees have thin, gray bark with resin blisters, while mature specimens develop thick, corky bark that protects them from fire. The foliage features spirally arranged, yellowish-gr