Prostanthera melissifolia

Erect shrub 1–5 m high, slightly, and faintly unpleasantly, aromatic; branches 4-ridged, sparsely to moderately covered with short, curled hairs and subsessile glands. Leaves ovate to narrowly ovate (rarely elliptic), 12–50(–60) mm long, 9–25(–30) mm wide, dull green, glabrous, base attenuate, often somewhat asymmetric, margin toothed, rarely entire, apex obtuse; petiole (8–)10–15 mm long. Flowers in a terminal bracteose, racemose or paniculate inflorescence; bracteoles persistent, 1–1.5 mm long, c. 0.1 mm wide. Calyx 3.3–5 mm long, tube 1.5–2.5 mm long, adaxial lobe 1.5–2.5 mm long (slightly enlarged in fruit); corolla dark mauve, occasionally pinkish, without markings, (8–)10–12 mm long; anther appendages 1 or 2 per locule (usually with 1 undeveloped), to 0.5 mm long, often apparently absent. Flowers spring.