Egeria densa is an aquatic plant growing in water up to 4 m (13 ft) deep, with trailing stems to 2 m (6.6 ft) or more long, producing roots at intervals along the stem. The leaves are produced in whorls of four to eight, 1–4 cm (0.39–1.57 in) long and 2–5 mm (0.079–0.197 in) broad, with a pointed leaf tip. The stem system of the plant will grow until it reaches the surface of the water, where it will begin to spread out, creating a thick flower canopy that blocks light from reaching plants below it.[3][4] It is dioecious, with male and female flowers on separate plants; the flowers are 12–20 mm (0.47–0.79 in) diameter, with three broad, rounded, white petals, 8–10 mm (0.31–0.39 in) long on male plants, and 6–7 mm (0.24–0.28 in) long on female plants.