The Gymnosperm Database


Natural forest of Tsuga diversifolia in Fukushima (FFPRI 1996).


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Conservation status

Tsuga diversifolia

(Maxim.) Masters 1881

Common names

Northern Japanese hemlock; KOME-TSUGA; KURO-TSUGA (Farjon 1990).

Taxonomic notes

Syn: Abies diversifolia Maxim.; Tsuga blaringhemii Flous (Farjon 1990).


Distribution and Ecology

Japan: Honshu and Kyushu, at 700-2000 m (Farjon 1990). Hardy to Zone 5 (cold hardiness limit between -28.8°C and -23.3°C) (Bannister and Neuner 2001).

Big tree



I can find (1999.02) only two studies, both seemingly of a relatively general nature (Sawada and Kaji 1992, Fujiwara and Ohta 1994).





Farjon, Aljos. 1990. Pinaceae: drawings and descriptions of the genera Abies, Cedrus, Pseudolarix, Keteleeria, Nothotsuga, Tsuga, Cathaya, Pseudotsuga, Larix and Picea. Königstein: Koeltz Scientific Books.

FFPRI = Forestry and Forest Products Research Institute. Apr-1996. Introduction to Forestry And Forest Products Research Institute. URL:, accessed 1998.10.12.

Fujiwara T. and Ohta S. 1994. Tree ring networks for climate changes, forest decline and wood quality in Japan. In Park Won-Kyu, Frank W. Telewski and Kim J.-S., eds., Proceedings of the International Symposium on Global Change and Forests. Journal of Korea Forestry Energy 14(1): 72-79.

Sawada H. and Kaji M. 1992. Studies on the regeneration dynamics of the natural forests in the Chichibu Mountains, central Japan II: Processes of the regeneration caused by wind damage in a subalpine coniferous forest ca. 110 and 150 years ago. Bulletin of the Tokyo University Forests 87: 175-193 [in Japanese with English summary].

See also

Last Modified 2017-12-29