Because of its distinctive cones, Douglas-firs were finally placed in the new genus Pseudotsuga (meaning "false Tsuga") by the French botanist Carrière in 1867. The Doug-firs gave 19th century botanists problems due to their similarity to various other conifers better known at the time; they have at times been classified as Pinus, Picea, Abies, Tsuga, and even Sequoia.
The Common North American Douglas-fir
Leaves: persistent or deciduous, linear or needle-like.
Fruit: Woody cones.