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红豆杉科、三尖杉科和罗汉松科的系统位置及系统发育关系长期以来都存有争议，本文对此三科在实验分类学方面的研究进展及趋势作了综述。
The taxonomic position and phylogeny of Taxaceae, Cephalotaxus and Podocarpaceae have been controversial for a long time. In this paper, the progress and trend of the taxonomic studies in these three families are summarized.