Cyrtandra munroi is a shrub with stems rounded to angular and covered in pubescent multicellular hairs, which may become glabrate over time. The leaves are simple and opposite, typically arranged on the stem’s upper 5–7 nodes. Each pair of leaves is slightly unequal, ranging from broadly elliptic to ovate or suborbicular, measuring 9.5–21 cm in length and 5.5–9.5 cm in width. The apex of the leaf is long-acuminate, while the base is cuneate. The upper surfaces of the leaves are sparse to moderately hirtellous, and the lower surfaces feature a moderately velvety pilosity with rust-colored hairs along the veins. The leaves are chartaceous with coarsely serrated margins. Petioles, which are 2.5–7.5 cm long, may sometimes clasp the stem or appear perfoliate. Stipules are absent. The flowers occur in (1–)3 open, lax, umbelliform cymes from the leaf axils. These inflorescences are densely villous with slender peduncles measuring 20–50 mm long. Pedicels are 14–20 mm long and can elongate to 20–28 mm when bearing fruit. Each flower is subtended by foliaceous, ovate bracts that are 9–12 mm long. The flowers themselves are bisexual (perfect) and feature a calyx that is 2–5(6)-lobed and nearly actinomorphic (radially symmetric), measuring 9–15 mm long, splitting about halfway down its length. The calyx lobes are elliptic-ovate and densely villous. The corolla is usually bilabiate, white, and conspicuously exserted from the calyx, with a cylindrical tube 15–20 mm long that is sparsely to moderately pilose. The upper lip of the corolla is 2-lobed, while the lower lip is 3-lobed. Stamens number five, with the two upper ones fertile and positioned about halfway up the corolla tube. The anthers are coherent and placed in the throat of the corolla tube, opening by longitudinal slits or sometimes apical pores. The ovary is superior, oblong-ovoid, and 2-carpellate but appears 1-celled due to the ± intruded placentas. It is sparsely to moderately puberulent and is often tipped with a stylar beak. The style is 6–8 mm long and may be glabrous or lightly hairy, leading to a capitate, 2-lobed stigma. The fruit is a white, conical-ellipsoid berry, measuring 1.8–2.3 cm long and puberulent, often retaining the persistent stylar beak. Seeds are numerous, ellipsoid, minute, about 0.4–0.7 mm long, and have a reticulate surface. It is found in wet forests at elevations between 910-920 meters, known only from a few scattered collections.