Hibbertia tricornis is a species of flowering plant in the family Dilleniaceae and is only known from a three specimens collected in Arnhem Land in the Northern Territory.

It is a small, more or less prostrate shrublet with a few delicate, wiry branches, elliptic leaves and yellow flowers arranged singly in leaf axils with 19 to 24 stamens arranged in groups around two densely scaly carpels.

Hibbertia tricornis is a more or less prostrate shrublet that typically grows to a height of up to 20 cm (7.9 in) and has a few delicate, wiry branches, and foliage covered with rosette-like hairs.

[2] Hibbertia tricornis was first formally described in 2010 by Hellmut R. Toelken in the Journal of the Adelaide Botanic Gardens from a specimen collected by Clyde Robert Dunlop on Mount Brockman on the edge of the Arnhem Land escarpment in 1978.

[2][3] The specific epithet (tricornis) means "three-horned", referring to the bract and outer sepal lobes.