Alstonia angustifolia

Alstonia angustifolia is a prominent evergreen tropical tree belonging to the Apocynaceae family. This species is recognized for its slender growth habit and significant ecological role within the humid rainforests of Southeast Asia, where it thrives in natural forest ecosystems.

The natural distribution of this species spans across the Malay Peninsula, Indonesia, and surrounding regions. It is well-adapted to high-rainfall environments, typically found in low-to-medium altitude forest areas. As a forestry resource, it is increasingly studied for its potential in managed plantation systems for sustainable timber extraction.

Botanically, the tree is characterized by a straight bole and distinct whorled leaves that are notably narrow, distinguishing it from other members of the genus. The bark is typically smooth, and the tree can reach heights of up to 30 meters under favorable conditions. It produces small, fragrant flowers that attract various pollinators in its native habitat.

Agricultural requirements for Alstonia angustifolia prioritize well-drained, nutrient-rich soils. While it demands high moisture levels to maintain active growth, it is sensitive to waterlogged conditions, which can lead to root degradation. Seedlings require careful nursery management to establish a robust root system before being outplanted into field conditions.

Economically, the tree is valued primarily for its lightweight timber, which is utilized in furniture manufacturing, plywood production, and general carpentry. Furthermore, traditional knowledge highlights the medicinal properties of its bark extracts, which contain alkaloids often tested for their bioactive potential in pharmaceutical research.

• Family: Apocynaceae.
• Distinguishing features: Narrow whorled leaves.
• Climate: Tropical, high rainfall, high humidity.
• Soil: Fertile, well-drained, deep.
• Primary uses: Timber, medicinal compounds.