Taiwan Catkin Yew, Amentotaxus formosana, is a species of conifer in the Taxaceae family. It is a small tree to 10 m (33 ft) tall, with a slender trunk. It was previously recognised as a variant of Amentotaxus argotaenia. Amentotaxus formosana is found only in Taiwan where it only occurs in four localities of cloud forest in the Hengchun Peninsula, in the extreme south of the island. IUCN considers A. formosana as critically endangered because of its populations are small and threatened by habitat loss. The populations are characterized by very low levels of genetic diversity.