Prostanthera spinosa

Spreading to erect shrub 0.2–2 m high, aromatic; branches with sparse to moderately dense antrorse to spreading-antrorse hairs, usually over a layer of much shorter antrorse hairs, rarely subglabrous except at nodes, sparsely glandular, with regular decussate spines 6–16 mm long. Leaves narrowly ovate to elliptic or trullate, 1.5–6(–8) mm long, 1–3(–4) mm wide, light to dark green, paler below, glabrous or with a few stiff spreading hairs on midrib below, rarely moderately densely hispid, copiously covered with subsessile glands below, base acute to subobtuse, margin entire, sometimes slightly recurved, apex obtuse; petiole 0.4–1 mm long. Flowers appearing axillary; bracteoles persistent, 0.9–2 mm long, 0.2–0.3 mm wide. Calyx 3.5–5 mm long, tube 2–3 mm long, adaxial lobe 1.5–2(–2.5) mm long (not enlarged in fruit); corolla pale mauve or pale lilac to white, orange-brown dotted or streaked in throat on lower lip, 8–14 mm long; anther appendage c. 1–1.5 mm long. Flowers Jul.–Dec.