The Buxaceae constitute a morphologically diverse phylogenetic lineage of six genera, which includes about 140 species. The most well-known genera are Buxus, Sarcococca, and Pachysandra. Few species of woody Styloceras grow on mid-elevations in the Andes mountains region. Didymeles, with three species endemic to Madagascar, and the monotypic Haptanthus from Honduras, are the most unusual members of the group. The infra-familial classification of Buxaceae is controversial, and molecular data about many species, especially Old World, is still lacking. We used broad taxonomic sampling and molecular data from four chloroplast markers, and the nuclear ribosomal ITS to estimate their phylogeny. These data provide phylogenetic placements of 50 species and enabled better estimates of boundaries in Buxaceae. We described two subfamilies, one monotypic genus, two Buxus subgenera, and one new species of Didymeles from Madagascar.

中文翻译：

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并非开箱即用：广泛采样的黄杨科的系统发育

梧桐科构成六个属的形态多样的系统发育谱系，包括约140个种。最著名的属是黄杨（Buxus），Sarcococca和Pachysandra。在安第斯山脉地区的中部海拔高度上，很少有木质的Styloceras生长。Didymeles是马达加斯加特有的三个物种，洪都拉斯的单型Haptanthus是该群体中最不寻常的成员。黄杨科的家庭下分类是有争议的，并且仍然缺乏关于许多物种，尤其是旧大陆的分子数据。我们使用了来自四个叶绿体标记物的广泛分类学采样和分子数据，以及核糖体ITS来估计其系统发育。这些数据提供了50个物种的系统发育位置，并能更好地估计黄杨科的边界。我们描述了两个亚科