Hibbertia acicularis
Hibbertia acicularis, commonly known as prickly guinea-flower, is a species of flowering plant in the family Dilleniaceae and is endemic to eastern Australia. It is an erect or prostrate shrub with linear to lance-shaped leaves and yellow flowers arranged singly in leaf axils with the six to eight stamens joined at the base, in a single cluster. Description. "Hibbertia acicularis" is an erect to prostrate, openly-branched shrub that typically grows to a height of up to . The leaves are linear to lance-shaped with an awned tip, mostly long and wide on a petiole long . The flowers are arranged singly in leaf axils on a thread-like peduncle long with a narrow egg-shaped bract. The sepals are long but of unequal lengths. The petals are yellow, long and egg-shaped with the narrower end towards the base. The six to eight stamens are joined at the base in a single cluster, all on one side of the two carpels. The carpels are velvety to woolly hairy and there are usually two ovules per carpel. Flowering occurs from September to December. Taxonomy. Prickly guinea-flower was first formally described in 1806 by Jacques Labillardière who  gave it the name "Pleurandra acicularis" in his book "Novae Hollandiae Plantarum Specimen". In 1862, Ferdinand von Mueller changed the name to "Hibbertia acicularis" in his book "The Plants Indigenous to the Colony of Victoria". The specific epithet ("acicularis") means "needle-pointed". Distribution and habitat. "Hibbertia acicularis" grows in heath, woodland and forest in south-eastern Queensland, the coast and tablelands of New South Wales, east of Port Phillip Bay in Victoria, and in Tasmania.