Shrub, spines absent; branchlets smooth, without distinct raised glands, +/- cylindrical in cross-section, glabrous. Leaves opposite, simple, 3-5.5 mm long, 0.5 mm wide, terete or subterete, smooth, without distinct raised glands, glabrous; stipular excrescences absent. Flowers in axillary, loose clusters (cymes or panicles) or in terminal, loose clusters (cymes or panicles); pedicels 4-5 mm long; calyx present, 2-3 mm long, smooth, without distinct raised glands, glabrous; corolla blue, petals four, 7-9.3 mm long, imbricate (overlapping), free, glabrous; stamens twice as many as petals, warty with prominent raised glands, glabrous, with an appendage. Flowers in September, October and November. Occurs in the South-West Botanical Province, in the Jarrah Forest, Mallee, Warren and Swan Coastal Plain IBRA region(s).