This is an evergreen tree. Its long, horizontal branches are densely covered with short, soft needles that become darker as the plant ages. This is also called as star pine, triangle tree or living Christmas tree. This is slow growing plant. It is commonly grown as a houseplant. Can grow up to 9' 10" indoors in pots.
While they're growing, real christmas trees support life by absorbing carbon dioxide and other gases and emitting fresh oxygen. As a houseplant, it will generally adapt to the warm, dry atmosphere found in most offices and homes.