About Parsonsia straminea (R.Br.) F.Muell.
Parsonsia straminea (R.Br.) F.Muell. is a woody vine. Its stems can reach 9 cm (3+1⁄2 in) in diameter, and extend 20 m (66 ft) into tree canopies. This species climbs via twining, with additional support from its adventitious roots. When cut or damaged, the plant releases a clear pale brown sap. Leathery adult leaves grow in opposite pairs along stems; they are yellowish green on the upper surface, and pale glaucous grey-green on the undersurface. Leaves measure 4–24 cm (1+5⁄8–9+1⁄2 in) long by 1.5–8 cm (5⁄8–3+1⁄8 in) wide, typically growing larger in shadier conditions. Leaves are elliptic to oblong-ovate in shape, with a round or cordate (heart-shaped) base.
Fragrant pale yellow flowers form in panicles between November and June, with flowering peaking in February. Flowers are followed by slender pods 10–20 cm (4–8 in) long. These pods split open to release seeds from September to December. The feathery seeds are dispersed by wind.
Parsonsia straminea grows along Australia's east coast, ranging from northeastern Queensland south to southern New South Wales, reaching as far south as Mount Gulaga. It occupies shady locations in rainforest and rainforest margins, as well as floodplains, growing on fertile soils derived from basalt or sandstone.
It is foraged by caterpillars of the common crow butterfly (Euploea core) and the Cairns hamadryad (Tellervo zoilus subsp. zoilus).
In cultivation, Parsonsia straminea grows well in a range of soil types and growing aspects. It can be used to cover fences and screens, but it may smother nearby plants. It can be propagated through cuttings or layering.
