(D. Don) Spach.
Distribution and Protected Areas – from Hamann et.al. 2005
Conservation Status Summary – from Krakowski et. al. 2009
“Yellow-cedar is likely adequately protected throughout its range in situ; however, ground-truthing of interior Protected Areas is required to estimate the protection level in this disjunct population. Inter situ installations are also adequate at present. Although there are some collections from interior populations, additional sampling is required for ex situ collections all along the central and north Coast and on Haida Gwaii, and comprehensive documentation of the interior populations is necessary.”