Lepidocupania glabra

Lepidocupania glabra is a small tree in the family Sapindaceae, part of a genus largely restricted to the biodiversity-rich forests of New Caledonia. Like many of its congeners, it is a slow-growing understorey or mid-canopy species adapted to the specialized soils and humid conditions of New Caledonian rainforest. The species is classified as Critically Endangered (CR) by the IUCN, with a decreasing population trend reflecting the ongoing pressures on its native habitat.

New Caledonia's forests, particularly those on ultramafic (nickel-rich) substrates, harbor exceptional levels of plant endemism but are also subject to intense mining activity, which has fragmented and destroyed large tracts of suitable habitat over recent decades. Fire, whether accidental or linked to land clearing, further degrades the remaining forest fragments where this species persists, and its naturally narrow distribution leaves it especially vulnerable to any single destructive event. Because Lepidocupania glabra is known from a limited number of localities, small-scale disturbances can have outsized effects on the overall population.

Conservation attention for New Caledonia's endemic flora has grown substantially in recent years, with protected area networks expanding to cover more ultramafic forest habitat and botanical institutions increasing efforts to document and conserve the region's unique tree species. Ex situ seed banking and herbarium-based research programs focused on New Caledonian endemics offer a genuine avenue for safeguarding genetic material from species like this one, even as in situ threats continue. Continued survey work is needed to refine population estimates and pinpoint remaining subpopulations, but the increasing scientific and conservation focus on New Caledonia's ultramafic flora provides a hopeful foundation for targeted action on this Critically Endangered tree.

This species is endemic to the Atlantic Forest (Mata Atlântica) of southeastern Brazil, occurring in humid lowland and montane tropical forests. It typically grows in well-drained soils within primary and secondary forest formations at elevations ranging from sea level to approximately 800 meters.