Doona trapezifolia, known as à ¶Âà ·Âà ¶±à ·Âà ¶º à ¶¯à ·Âà ¶±à · (tiniya dun) in Sinhala, is a species of flowering plant in the family Dipterocarpaceae. It is a tree endemic to Sri Lanka. It is native to the remaining lowland rain forests and sometimes montane rain forests in southwestern Sri Lanka, usually on deep soils.