However there is still more, Eckenwalder (2009) states that leaf chemistry and DNA sequences (Mao et al., 2012) show that Alaska-cedar belongs in Cupressus and hence Cupressus nootkatensis. It was thought that at decision would be made at 2011 International Botanical Congress, but for some reason the proposal did not make it to the committee which decides taxonomic conflicts (John Russell, 2011). The name Xanthocyparis was proposed for conservation, but until that is decided on, it is correctly classified in Callitropsis. Thus Callitropsis would be the correct name for these species (Golden Vietnamese Cypress and Alaska-cedar) under the ICBN when treated in a distinct genus. 91:1872), while confirming the above relationship with further evidence, pointed out that an earlier nomenclatural combination in the genus Callitropsis existed, as Callitropsis nootkatensis (D.Don) Oerst., published in 1864 but overlooked or ignored by other subsequent authors. Apparently a good deal of evidence justifies placing both species in the same genus, and hence Alaska-cedar was renamed as Xanthocyparis nootkatensis. The tree was classified in a new genus in the family Cupressaceae as Xanthocyparis vietnamensis (Golden Vietnamese Cypress), its closest relative appears to be the Alaska-cedar.
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