Neraudia ovata is a scandent or sprawling, sometimes erect shrub or tree, typically reaching 1–3 meters long. The stems are 1–3 meters long and puberulent, supporting leaf growth and reproductive structures. The leaves are simple and alternate, with ovate to elliptic-ovate or elliptic blades ranging from 4 to 12 cm in length and 2 to 6.5 cm in width. These leaves are notable for containing disciform cystoliths. The apex is abruptly acuminate or long-acuminate, and the base ranges from cuneate to very broadly so. The upper surfaces are sparsely appressed pubescent, while the lower surfaces are moderately pubescent with spreading, curved, nearly translucent hairs that are randomly or apically directed and 0.2–0.4 mm long. The leaves are thin, grayish to greenish on the lower surface, with entire margins, and are palmately 3-veined from the base. The petioles are 1–2 cm long and densely pubescent. Stipules are small and intrapetiolar. It is dioecious, with unisexual flowers appearing in axillary clusters. Staminate (male) flowers are borne on pedicels 0–1 mm long, while pistillate (female) flowers are sessile. The calyx of staminate flowers is densely covered with appressed erect hairs and shorter, erect, uncinate hairs, featuring four boat-shaped lobes, each 3–4.5 mm long, with a long-acuminate apex, coherent in bud but separating at anthesis. The pistillate calyx lobes are connate into a perigynium, densely covered with similar hairs, and the apex is unlobed, collar-like, or 3–4-toothed. Corolla (petals) is absent. Staminate flowers have four staminal filaments folded elastically in the bud and reflexed when pollen is shed. Anthers are reniform, dithecal, and open by longitudinal slits to release white pollen. The ovary in pistillate flowers is superior and pseudomonomerous (one fertile carpel and more or less prominent traces of sterile carpel(s)) with a single basal ovule; the style is solitary, and the stigma is 4–7 mm long and receptive all around. The fruit is a 2–3 mm long red achene with a depressed-conical apical portion separated from the basal portion by a complete constriction. The basal portion is sometimes somewhat lobed. Each achene contains one ovoid seed with a lateral, transverse constriction. It is found in habitats ranging from dry forests to open lava flows and subalpine forests at elevations between 300-1,470 meters.