Swainsona greyana, commonly known as Darling Pea or Hairy Darling-Pea, is a shrubby perennial herb native to arid woodlands and grasslands of Australia, particularly in New South Wales and Queensland. It typically grows to a height of 1.5 meters and features hairy stems with pinnate leaves that are 10 to 15 cm long. From late winter to early autumn (September to March in its native range), it produces racemes of 12 to 20 pea flowers with corollas that can be white, pink, or purple, attracting pollinators. The flowers are followed by elliptic pods that are 30 to 50 mm long. A notable characteristic of this plant is the presence of the alkaloid swainsonine, which can cause alpha-mannosidosis in grazing livestock, making it a potential hazard in pastures.

Darling Pea is valued for its drought tolerance and its ability to thrive in poor soils, making it suitable for xeriscaping and as an ornamental in arid climate gardens. It is often used for its showy flowers and as a part of native plantings that require minimal maintenance. In cultivation, it prefers full sun to part shade and requires medium amounts of water with well-drained soil. While it is generally easy to maintain, it is important to be aware of its toxic properties, especially in areas with livestock.CC BY-SA 4.0