It carries conspicuous orange woody fruits about 1 cm in diameter for several months after flowering in spring or early summer.

[7] Even though it is native to the region, it has spread to soils and bushland where it wasn't found before European settlement, often out-competing other plants.

[8] P. undulatum has done especially well in areas where the environment has been altered by humans – for example by habitat fragmentation weakening other natives, due to fertilizer runoff from homes increasing soil nutrients, and by the suppression of bushfires near suburbs.

Unlike most natives, it takes advantage of high nutrient levels and its seeds can germinate without needing fire.

[citation needed] Recommended control measures have included the identification and selective removal of female trees to prevent spread, as well as careful burning, where possible, together with follow-up weeding.