Cyrtandra viridiflora is a small shrub, ranging in height from 0.5 to 2 meters, characterized by its branched, rounded to angular stems that may be pubescent with multicellular hairs or glabrate. The leaves are simple, typically arranged oppositely, and borne mainly on the stem’s upper 1 to 3 nodes. The leaves within a pair are subequal and symmetrical or nearly so, featuring a cordate shape. They measure 6–15 cm in length and 3.5–7.5 cm in width and are thick and somewhat fleshy. The leaf apex is acuminate, and the surfaces are densely covered with velvety villous hairs that are pale initially but become rust-colored as the leaves dry. The margins of the leaves are serrated to denticulate. The petioles, which are 2.4–6.5 cm long, sometimes clasp the stem or appear perfoliate, and no stipules are present. The flowers occur in umbelliform cymes consisting of 1–5 flowers originating from the leaf axils. These cymes are densely villous throughout, with stout peduncles ranging from 6 to 30 mm long and stout pedicels 18 to 30 mm long. The foliaceous bracts are lanceolate and caducous, measuring 10–15 mm long. The flowers themselves are bisexual (perfect) and feature a nearly actinomorphic (radially symmetric) calyx that is pale green and 12–15 mm long, split unequally about halfway or two-thirds along its length into lanceolate lobes that are densely villous outside and glabrous inside. The corolla is typically bilabiate and possibly green, with a cylindrical tube that flares slightly at the mouth, measures 17–22 mm in length, and is about 8–9 mm in diameter, covered in dense white villous hair. It has a two-lobed upper lip and a three-lobed lower lip with lobes imbricated in bud. The stamens are five in number, with the two upper ones fertile and the others potentially staminodial; the fertile anthers are positioned in the throat of the corolla tube. The superior ovary is oblong-ovoid, 2-carpellate, and contains numerous anatropous ovules; it is topped with a style about 3–4 mm long that ends in a capitate, two-lobed stigma. The fruit is a white, ovoid, fleshy, or firm berry, more than 1.3 cm long, and glabrous, often retaining the persistent stylar beak.  It inhabits scattered, wind-blown ridgetops within cloud-covered wet forests, particularly along mountain crests, between 700-830 meters.