This species is closely related to Tsuga dumosa and Tsuga chinensis and shows intermediate characters. It occurs in the area where the ranges of these two species meet: the Lijiang Shan and mountains to the northwest (NW Yunnan) and north (SW Sichuan). In Flora of China 4: 41 (1999), T. forrestii has been treated as a variety of T. chinensis.
Forrest's Hemlock is a timber tree used for construction, aircraft, furniture and as props for mines. This species is present in several arboreta in Europe and North America, almost exclusively from early 20th century introductions made by the famous 'plant hunters' of the time.
References and further reading
- Cun, Y.Z. & X.Q. Wang 2015. Phylogeography and evolution of three closely related species of Tsuga (hemlock) from subtropical eastern Asia: further insights into speciation of conifers. Journal of Biogeography 42:315-327.
- Havill, N.P., C.S. Campbell, T.F. Vining, B. LePage, R.J. Bayer & M.J. Donoghue 2008. Phylogeny and Biogeography of Tsuga (Pinaceae) Inferred from Nuclear Ribosomal ITS and Chloroplast DNA Sequence Data. Systematic Biology 33(3):478-489.
- Wang, C.W. 1961. The forests of China with a survey of grassland and desert vegetation. Maria Moors Cabot Foundation, Harvard University, Cambridge, MA.
- Wu, Z. and Raven, P.H. (eds). 1999. Flora of China: Vol.4. Cycadaceae through Fagaceae. Science Press (Beijing) & Missouri Botanical Garden (St. Louis).
- Yang, Y. & Luscombe, D (2013). Tsuga forrestii. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.1. <www.iucnredlist.org>. Downloaded on 12 July 2013.