prickly hibbertia

Hibbertia mucronata is a shrub that typically grows to a height of up to 1 m (3 ft 3 in) and has woolly-hairy branchlets. The leaves are crowded, spirally arranged, thick, linear tapering to a sharp point, 5–18 mm (0.20–0.71 in) long and 0.9–1.5 mm (0.035–0.059 in) wide on a petiole 1.0–1.5 mm (0.039–0.059 in) long. The flowers are arranged singly in leaf axils and more or less sessile or on a hairy peduncle up to 2 mm (0.079 in) long, sometimes with sharply-pointed bracts at the base. The five sepals are joined at the base, the outer sepals 6.0–8.5 mm (0.24–0.33 in) long, the inner ones 5–5.5 mm (0.20–0.22 in) long. The five petals are golden yellow, egg-shaped with the narrower end towards the base and 6–9 mm (0.24–0.35 in) long with a notch at the tip. There are five stamens, fused at the base on one side of the two densely hairy carpels that each contain two ovules. Flowering mostly occurs between August and December.

This species grows in rocky places or in sandy heath or mallee-scrub in the Fitzgerald River National Park and east to Ravensthorpe and Hopetoun in the south of Western Australia.