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Leaves 3-whorled, sessile or shortly petiolate; lamina up to 10 × 2.8 cm, usually smaller on the branchlets, narrowly elliptic to elliptic, acute or nearly so at the apex, cuneate at base, minutely serrate to slightly or distinctly crenate-serrate at the margins towards the apex, chartaceous, grey-green, often folded along the midrib; midrib and main lateral nerves somewhat impressed above, ± raised beneath, reticulum slightly prominent beneath.
Perennial herb or subshrub up to 1.3 m high from a woody rootstock, with leaves pleasantly aromatic when crushed, densely and shortly whitish puberulous on stem, branches, leaves and peduncles with numerous minute pale yellowish spherical sessile glands intermixed with the hairs; branchlets spreading, slender, with the inflorescences borne in the axils of the upper 1–10 leaves.
Calyx 2-lobed, 1.5–2 mm long, the lobes c. 1/4–1/3 as long as the tube, densely hairy everywhere on the outside, the hairs rather long, white.
Corolla slightly to strongly scented, white, 3–5 mm long, pubescent on the upper half except for the lobes which are mainly glandular.
Mericarps plano-convex, c. 1.5 × 1.2 mm, oblong.
