Step 1: Understanding the Concept:
Dendrology and forest botany require identifying commercially and ecologically important regional tree species by their correct scientific botanical nomenclature.
Step 2: Detailed Explanation:
- Hollong is a majestic, tall timber tree species found in the tropical wet evergreen forests of Northeast India.
- Its scientific name is Dipterocarpus macrocarpus, a key member of the family Dipterocarpaceae.
- It is highly celebrated as the State Tree of Assam and is historically used for plywood, railway sleepers, and structural timber.
- Terminalia myriocarpa is known as Hollock.
- Tsuga dumosa is Himalayan hemlock.
Step 3: Final Answer:
The scientific name of the "Hollong" tree is Dipterocarpus macrocarpus.