Robert H. Mohlenbrock. USDA NRCS. 1995.
Northeast wetland flora: Field office guide to plant species
. Northeast National Technical Center, Chester. Provided by USDA NRCS Wetland Science Institute (WSI).
Numerous cultivars of Tsuga canadensis have been developed, including compact shrubs, dwarfs, and graceful trees. Wood of the species tends to be brittle and inferior to that of the other North American hemlocks.
Eastern hemlock ( Tsuga canadensis ) is the state tree of Pennsylvania.