Acronychia wilcoxiana, commonly known as silver aspen, is a species of flowering plant in the citrus family, Rutaceae. This tree is native to eastern Australia and holds a place in its regional flora due to its distinctive appearance and ecological role. The silver aspen is a small to medium-sized tree, typically reaching heights of 8 to 20 meters, though it can occasionally grow taller. Its growth habit is generally upright, forming a canopy that can be somewhat spreading. The leaves are a prominent feature, being compound and trifoliate, meaning each leaf stalk bears three leaflets. These leaflets are ovate to elliptic in shape, with smooth, entire margins, and they are typically glossy green on the upper surface. A characteristic feature that contributes to its common name is the paler, often silvery-white underside of the leaflets, which can be quite noticeable when the leaves flutter in the breeze. The bark of Acronychia wilcoxiana is usually smooth and greyish, becoming slightly rougher with age. Flowering occurs from late spring through summer, producing clusters of small, fragrant flowers. The flowers are typically white or cream-colored and possess four petals. These flowers are attractive to pollinators, playing a role in the local ecosystem. Following successful pollination, the plant develops fruits, which are small, globular drupes. These fruits are initially green and mature to a yellowish or brownish hue. They contain seeds, which are the means of reproduction for the species. Acronychia wilcoxiana is found in its natural habitat in rainforest margins, wet sclerophyll forests, and along creek banks. It prefers moist, well-drained soils and often grows in areas with a good amount of rainfall. Its native distribution extends along the east coast of Australia, from southern Queensland down into New South Wales. While it is a native species, it is also cultivated in gardens and landscapes, particularly in its native regions, for its attractive foliage and ornamental qualities. It is generally considered to be moderately hardy once established, tolerating a range of conditions within its preferred climate. Ecologically, Acronychia wilcoxiana serves as a food source for various native fauna, with its fruits being consumed by birds and other animals. Its flowers provide nectar for insects. While not widely used for significant economic purposes, its presence contributes to the biodiversity of Australian forests. Interesting adaptations include its ability to thrive in the dappled light conditions often found at the edge of rainforests and its fragrant flowers, which likely aid in attracting pollinators in a competitive environment. The silvery undersides of its leaves may also play a role in thermoregulation or deterring herbivores, though further research would be needed to confirm these specific functions.