Hibbertia hypericoides, commonly known as Yellow Buttercups, St. John’s Guinea Flower, or simply Guinea Flower, is a shrub native to a variety of habitats in Australia, including coastal heathlands, open eucalypt woodlands, and dry sclerophyll forests. It is often found on sandy soils among rocks, which reflects its adaptability to well-drained conditions. This plant typically grows at a moderate rate to a height and width of 1-2 feet (0.3-0.6 meters), forming a dense, bushy habit. The bright yellow, showy flowers resemble buttercups and bloom profusely in the spring and summer, adding a splash of color to the garden.

Hibbertia hypericoides is valued for its vibrant yellow flowers and its ability to thrive in poor soils, making it a popular choice for rockeries, native plant gardens, and as a ground cover. It is also used to stabilize sandy soils and is suitable for coastal gardens due to its tolerance of salt spray. In cultivation, it prefers full sun to part shade and requires well-drained sandy or loamy soils. While it tolerates medium amounts of water, it is relatively drought-tolerant once established. There are no major disease problems associated with this plant, but it may suffer from root rot if overwatered or planted in poorly drained soils. It is not known to be invasive outside its native range.CC BY-SA 4.0