Hibbertia hamulosa is a species of flowering plant in the family Dilleniaceae and is endemic to the south coast of Western Australia. It is a shrub with somewhat crowded, thick, linear leaves and golden yellow flowers with five to eight stamens fused at their bases, all on one side of two densely hairy carpels.
Hibbertia hamulosa is a spreading shrub that typically grows to a height of up to Шаблон:Cvt and has branchlets densely covered with woolly, grey or white hairs when young. The leaves are crowded, linear to awl-shaped, almost needle-shaped, Шаблон:Cvt long and Шаблон:Cvt wide on a petioleШаблон:Cvt long. The flowers are arranged singly on the ends of short side shoots, on a densely hairy peduncleШаблон:Cvt long with awl-shaped bracts at the base of the sepals. The five sepals are joined at the base, Шаблон:Cvt long, the inner ones slightly broader than the outer ones. The five petals are golden yellow, egg-shaped with the narrower end towards the base and Шаблон:Cvt long with a notch at the tip. There are five to eight stamens, fused at the base on one side of the two densely hairy carpels that each contain two ovules. Flowering mostly occurs between July and October.[1][2]