Plant
Dipterocarpus retusus
Dipterocarpus retususAlso known as Hollong, Chheuteal Bangkuoy, Hollong Gurjan
Rising majestically into the canopy of Southeast Asian rainforests, this towering hardwood serves as a structural keystone that shelters countless epiphytes, hornbills, and primates. Its winged seeds spiral downward during mass masting events, a synchronized fruiting strategy adapted to overwhelm seed predators. Revered as the state tree of Assam and Arunachal Pradesh, mature specimens yield an aromatic oleoresin historically valued for waterproofing boats and medicinal ointments.
Canopy TreeRainforest Native
—observations
—countries
—peak records
EndangeredConservation statusIUCN Red List categoriesLCNTVUENCREWEXEndangeredRed List categories, explained →
Diet & preyAutotrophic (photosynthetic)
ThreatsDeforestation, illegal logging for timber, agricultural conversion, and habitat fragmentation
HabitatsDense lowland and hill evergreen rainforests, riverbanks, and slopes
Life span150–250 years
Classification
- FamilyDipterocarpaceae
- SpeciesDipterocarpus retusus
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Safe to observe at a normal distance.
- What to notice
- Look for a towering, columnar trunk with pale grey bark, large elliptic leaves, and two-winged samara fruits.
- Support conservation
- Observe without stripping bark, tapping sap, or disturbing root systems in protected reserves.
Responsible observation
- Look Up: Search the forest canopy for its massive straight trunk and distinctive winged fruit fallen on the ground.
- Habitat Protection: Avoid disturbing delicate buttress roots and seedling beds on the forest floor.
Neighbor Shantanu Kuveskar / CC BY-SA 4.0 · cc-by-sa
Close Relative This Photo was taken by Supanut Arunoprayote. Feel free to use any of my images, but please mention me as the author and may send me a message. (สามารถใช้ภาพได้อิสระ แต่กรุณาใส่เครดิตผู้ถ่ายและอาจส่งข้อความบอกกล่าวด้วย) Please do not upload an updated image here without consultation with the Author. The author would like to make corrections only at his own source. This ensures that the changes are preserved.Please if you think that any changes should be required, please inform the author.Otherwise you can upload a new image with a new name. Please use one of the templates derivative or extract. / CC BY 4.0 · cc-by
Image unavailableSame Family
Help improve the field guideSomething wrong?
Checking your Fauna account…Report a name, category, or profile issue for review.