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Key to Cultivated Tsuga Species
http://members.tripod.com/~Hatch_L/tsugmpi.html
Includes revised species concepts and cultivar groups.
Tsuga
http://www.botanik.uni-bonn.de/conifers/pi/ts/index.htm
Description of the genus and its 8 species.
Tsuga canadensis
http://www.fs.fed.us/database/feis/plants/tree/tsucan/
Information on distribution and occurrence, value and use, characteristics, and fire ecology.
Tsuga canadensis
http://www.albion.edu/plants/tsugcapg.htm
Image of Carolina hemlock foliage and cones.
Tsuga caroliniana
http://www.fs.fed.us/database/feis/plants/tree/tsucar/
Distribution and occurrence, value and use, characteristics, and fire ecology.
Tsuga heterophylla (Western Hemlock)
http://www.for.gov.bc.ca/hfd/library/documents/treebook/westernhemlock.htm
Features photos of entire tree, leaves, cones, and bark. Describes physical characteristics, habitat, and human uses.
Tsuga mertensiana
http://www.fs.fed.us/database/feis/plants/tree/tsumer/
Distribution and occurrence, value and use, characteristics, and fire ecology.
Tsuga mertensiana (Mountain Hemlock)
http://www.for.gov.bc.ca/hfd/library/documents/treebook/mountainhemlock.htm
Describes physical characteristics and habitat. Provides photos of entire tree, leaves, cone, and bark.