Cyanea floribunda is a shrub that grows 0.3 to 1.2 meters tall, characterized by tan latex. The stems are sub-herbaceous, becoming woody only at the base, and are either unbranched or sparingly branched from the base, with a pubescent surface. The leaves are alternate, with elliptic blades measuring 15–27 cm long and 4–8.5 cm wide. These leaves have a narrowly acuminate apex and a cuneate base. The upper surface of the leaf is green and can be either glabrous or sparsely pubescent, while the lower surface is whitish green and pubescent, particularly on the midrib and veins. It produces inflorescences with 6–16 flowers featuring pubescent peduncles that are 5–20 mm long. The calyx lobes are narrowly triangular, measuring 3–5 mm long, with an acuminate apex. The corolla is white, occasionally tinged with purple, and is 20–25 mm long and 3–4 mm wide. It is sparsely pubescent or nearly glabrous, with a suberect to gently curved tube and spreading lobes that are one-third to half as long as the tube. The staminal column is glabrous, with pubescent anthers, the lower two of which have apical tufts of white hairs. The fruit is an orange, ellipsoid berry, 8–10 mm long. It is found in wet forest habitats at elevations ranging from 460-1,520 meters.