About Prostanthera densa A.A.Ham.
Prostanthera densa, also commonly called villous mint-bush, is an erect, aromatic, often compact shrub. It typically grows to a height between 0.5 and 2 metres (1 ft 8 in – 6 ft 7 in) and has hairy branches. Its leaves are egg-shaped to triangular, usually hairy, 10–15 mm (0.39–0.59 in) long, 7–12 mm (0.28–0.47 in) wide, and grow from a petiole 1–1.5 mm (0.039–0.059 in) long. Flowers are arranged singly in two to ten of the uppermost leaf axils, with bracteoles about 5 mm (0.20 in) long at the base of each flower. The sepals are hairy, sometimes tinged with purple, and 6.5–8 mm (0.26–0.31 in) long. They form a tube about 4 mm (0.16 in) wide with two lobes, where the upper lobe is 3–3.5 mm (0.12–0.14 in) long. The petals are pale mauve to mauve with orange and white markings, 12–15 mm (0.47–0.59 in) long, forming a tube 6–8 mm (0.24–0.31 in) long. The lower central petal lobe is 6.5–10 mm (0.26–0.39 in) long, the lower side lobes are 2.5–5 mm (0.098–0.197 in) long, and the upper lobes are 3–4.5 mm (0.12–0.18 in) long, fused with a central notch 1.5–2 mm (0.059–0.079 in) long. A small number of flowers can appear throughout the year, with flowering peaking in spring. This species grows in forest and shrubland on the coast and nearby ranges between Nelson Bay and the Beecroft Peninsula.
