Boronia defoliata F.Muell.

Woody perennial to 0.6 m high, glabrous except on flowers. Branchlets slender; decurrent leaf bases faint. Leaves caducous, sessile, filiform, terete or subterete, c. 5 mm long, shorter than internodes, acute, rounded abaxially and flat adaxially. Flowers in terminal and axillary shortly pedunculate cymes; pedicels slender, 3–5 mm long. Sepals broadly ovate, c. 2 mm long, leathery with scarious margins, glabrous. Petals elliptic, c. 5–7 mm long, thin, glabrous, white to pink adaxially, pale blue with darker medial strip abaxially. Stamens: filaments linear, sparsely woolly-ciliate, glandular-verrucose at apex; anthers 1 mm long; apiculum acute to obtuse, c. 0.3 mm long. Ovary glabrous; style slender, c. 1 mm long; stigma minute.

Grows in gravelly soil, often on fringes of swamps.