Austrotaxus is a monotypic genus in the yew family Taxaceae, order Coniferales, containing a single living species: Austrotaxus spicata, commonly known as the New Caledonia yew or southern yew. It is closely related to the other yew genera Taxus and Pseudotaxus, and together these form the core of the yew family.
Plants are dioecious coniferous shrubs or small trees, typically reaching 5–20 m in height (rarely to 25 m), with distinctive reddish bark. The leaves are lanceolate, flat, 8–12 cm long and approximately 4 mm broad (up to 17 cm on juvenile plants), dark green above and bearing two paler green stomatal bands on the underside. They are arranged spirally along the stem, a layout shared with relatives in Taxus but differing markedly in their notably greater length — a key distinguishing character from that genus.
As a dioecious plant, male and female reproductive structures occur on separate individuals. The seed cones are drupe-like, 20–25 mm long, and bear a fleshy aril that almost entirely encloses the single seed, leaving only the tip exposed — a structure convergent with the better-known arillate fruits of Taxus. Male pollen cones are slender, 10–15 mm long.
Austrotaxus spicata is endemic to New Caledonia, a biodiversity hotspot in the South Pacific, where it occurs in the central and northern parts of the main island at altitudes of 300–1,350 m. The genus represents an isolated and ancient lineage within the yews, and its sole species is the only yew native to the Southern Hemisphere outside of the Gondwanan podocarp radiation.
Distribution
Austrotaxus spicata is endemic to New Caledonia, restricted to the central and northern parts of the main island. It grows at elevations of 300–1,350 m above sea level, making it the only yew genus native to the South Pacific islands.
Taxonomy Notes
Austrotaxus is the sole member of a monotypic genus within the family Taxaceae (order Coniferales). It is related to Taxus and Pseudotaxus but is distinguished by its markedly longer leaves (8–12 cm versus typically 1–3 cm in Taxus) and its larger, drupe-like seed cones. GBIF recognises the genus as accepted with a single accepted descendant taxon.
