Xanthocyparis Farjon et Hiep

Xanthocyparis is a segregate of Chamaecyparis, mainly distinguished by the absence of white markings on the scale leaves (and strongly supported by recent molecular phylogenetic studies; see Little & al. 2004). It counts two species: the North American and widely cultivated Xanthocyparis nootkatensis and a rare endemic in northern Vietnam (X. vietnamensis Farjon et Nguyen) (see Farjon & al. 2002).

The application of the generic names Xanthocyparis and Callitropsis remains controversial (compare Little & al. 2004 and Mill & Farjon 2006). Also, Xanthocyparis has been considered part of Cupressus. Mao & al. (2010) found that Xanthocyparis is embedded within Cupressus, its treatment as a separate genus leaving Cupressus paraphyletic. Xanthocyparis sensu Farjon is itself paraphyletic, with Nootka Cypress more closely related to other American Cupressus species, than it is to Vietnamese Cypress.



Farjon A. (2005b) A monograph of Cupressaceae and Sciadopitys. Kew Publishing: 648 p.

Farjon A., Hiep N., Harder D.K., Loc P.K. & Averyanov L. (2002) A new genus and species in the Cupressaceae (Coniferales) from northern Vietnam, Xanthocyparis vietnamensis. Novon 12: 179-189.

Little D.P., Schwarzbach A.E., Adams R.P. & Hsieh C.-F. (2004) The circumscription and phylogenetic relationships of Callitropsis and the newly described genus Xanthocyparis (Cupressaceae). Amer. J. Bot. 91(11): 1872-1881.

Mao K., Hao G., Liu J.,Adams R.P. & Milne R.I. (2010) Diversification and biogeography of Juniperus (Cupressaceae): variable diversification rates and multiple intercontinental dispersals. New Phytologist 188(1): 254–272. [available online at: https://www.researchgate.net/publication/44685854_Diversification_and_bi...

Mill R.R. & Farjon A. (2006) Proposal to conserve the name Xanthocyparis against Callitropsis Oerst. (Cupressaceae). Taxon 55(1): 229-231.

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith