The Chatham Island Christmas tree was formerly more common and widespread on Chatham Island, but has experienced serious declines over the past century. By contrast, this species is still fairly widespread on Pitt Island, and even expanding where stock and feral animals are rare, but diminishing elsewhere (4). A myriad of threats are believed to have impacted the tree, including destruction of its forest habitat type and browsing and trampling by cattle, sheep, pigs and possums (1) (4). Worryingly, there have been recent reports of sudden collapses and die-back of apparently healthy trees, speculated to be the result of soil borne pathogens such as Phytophora and Verticillium wilt. In addition, propagated seeds collected from isolated trees have shown very poor germination, suggesting that the species is self-incompatible. This is of particular concern on Chatham Island, where parts of the island are now represented by isolated individuals, and has important implications for future management (4).