Leptolaena arenaria is a tree in the family Sarcolaenaceae. It is endemic to Madagascar.
Leptolaena arenaria grows up to 12m (39feet) tall with a trunk diameter of up to 30cm (10inches). Its bright green leaves are ovate in shape and measure up to 7cm (03inches) long. The tree's flowers typically occur in inflorescences of two flowers, each with white petals. The roundish fruits measure up to 1.21NaN1 in diameter.
Leptolaena arenaria is known only from the northwestern regions of Diana, Betsiboka, Boeny, Melaky and Sofia. Its habitat is dry forests from 50m (160feet) to 200m (700feet) elevation. Only a few populations are within protected areas.
Leptolaena arenaria is in decline due to wildfires and the harvesting of its wood. The preliminary status of the species is Near Threatened.