It belongs to the Dipterocarpaceae Family, with the Latin name of Hopea hainanensis Merr.

The evergreen arbor can grow up to 25 to 30 meters high, with a chest diameter of 60 to 85 centimeters. Its pitchy bark has shallow splits. There are thick fluffs on twigs and inflorescences. The keratinous oval leaves are 6.5 to 20.5 centimeters long. The conical inflorescences are acrogenous or borne on top of the axillae with small flowers, sideling borne on one side of branchy stems of the inflorescence and consisting of 5 petals and 15 stamens rowed in 2 cycles. The ovary is in the shape of cylinder, intumescing at the bottom of the interlobule. Its ovoid nut is wrapped in the swollen base of calyx of which 2 sepals expand into aliform, lance-shaped and about 7 centimeters long, with 7 to 9 longitudinal veins.     

Hainan Hopea grows near streamside and gullies, and on southeast slopes and hills of mountainous areas 400 to 800 meters above sea level. It requires such habitat as a place with torridity, calm wind and moist. It lives in mountainous latosol and latosolic red soil developed mainly from parent material of granite. Hainan Hopea is a shade species, with good natural regeneration under forest canopy. The adult tree blossoms from August to September, and fruits ripen in March and April of the following year.

It is sparsely distributed over mountainous areas of Hainan Province. There are only hundreds of adult individuals in existence. It's a representative and endemic species of rain forests in tropic ravine of Hainan Province, and of a high value for scientific research. The timber is tough and lasting, waterproof and mothproof, reputed as the best species among trees in Hainan. Therefore it is suitable for special manufacturing, arts and crafts and hardwood furniture. At present, it is protected on the list of tree species prohibited from lopping and has been planted experimentally in small areas where it grows healthily.