A map from 1911 of North America showing the distribution patterns of the dominant conifers in Canada and eastern United States to Alaska. The species shown are Picea mariana (Black Spruce), Larix laricina (Tamarack), Pinus divaricata (Jack Pine), Abies balsamea (Balsam Fir), Pinus strobus (Eastern White Pine), and Tsuga Canadensis (Eastern or Canadian Hemlock).