Thriving in the dense canopy of tropical rainforests across Australia and Asia, this majestic evergreen tree remains a species of significant ecological importance. Known under the accepted scientific name of Ailanthus triphysa, it has historically been valued for its soft wood and sticky aromatic resin. The plant serves as a vital component of its native ecosystems, hosting various specialized insect larvae and stabilizing forest soil.
This medium to tall evergreen tree is capable of reaching heights of up to 30 meters, with a trunk diameter that can extend to 1.2 meters. Its trunk is notably straight and cylindrical without buttresses, wrapped in light grey bark that feels rough like sandpaper. The young branchlets are marked with prominent lenticels and display yellow blazes with distinct reddish speckles.
The foliage consists of large, pinnate leaves featuring curved, sickle-shaped leaflets that draw out into a fine point. These leaflets display a highly oblique base, with prominent net venation running beneath the leaf blade. The small, creamy green flowers cluster in large branched panicles, which later develop into dry, winged samaras that typically form in groups of three.
Creamy green flowers bloom from November to January in Australia, and from December to May in India.
The light, yellowish wood is relatively brittle and has found usage in local manufacturing, particularly for the production of matchwood and plywood. Additionally, the soft timber is sometimes burned to produce high-quality charcoal. The bark and leaves contain a variety of active compounds, including alkaloids and quassinoids, which have been explored in traditional medicine.
The aromatic resin exuded from cuts in the bark is locally referred to as halmaddi. This sticky secretion has historically been harvested to act as a natural fixative in the production of traditional incense sticks. Due to unsustainable harvesting practices causing tree mortality, commercial extraction of this resin has been heavily regulated.
The leaves of this tree serve as a primary food source for the larvae of the Eligma narcissus moth. While young caterpillars feed by skeletonizing the leaf surface, mature caterpillars can completely defoliate large branches. The resin is also a well-known ingredient in traditional Indian incense, where it provides a characteristic earthy fragrance.
A tall rainforest tree variety native to eastern Australia, recognized for its glabrous foliage and winged fruits.
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Ailanthus triphysa
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