Boronia xanthastrum Duretto

Subshrub to 50 cm high. Young branches with a dense, yellow, stellate indumentum. Stellate hairs with 5–10 (–14) rays; rays firm, glossy, smooth, yellow, becoming white with age. Leaves: petiole 0.5–1.5 mm long; lamina narrowly elliptic to elliptic to lanceolate, 10–36 mm long, 2.5–6.5 mm wide, attenuate to cuneate at base, acute, with sparse to moderately dense stellate indumentum. Peduncle 0.5–1 mm long; pedicel 0.5–1.5 mm long. Perianth yellow-green. Sepals ovate-deltate, 3.5–7 mm long, 1–2.5 mm wide, acuminate; adaxial surface glabrous. Petals 2.5–4 mm long, 1–1.5 mm wide; adaxial surface with sparse to moderately dense indumentum.

Grows on schists (Mount Basedow Range) and sandstones (escarpment country) in both heath and woodland communities.