American holly (Ilex opaca) in a bush single form develops as a dense evergreen woody perennial with multiple upright stems emerging from a single base. The foliage consists of thick, glossy leaves with sharply pointed margins, arranged alternately along rigid branches that form a compact, rounded canopy. The bark is pale gray and slightly textured, contrasting with the dark green leaves.

Native to the eastern and southeastern United States, Ilex opaca commonly inhabits mixed hardwood forests, coastal plains, and woodland edges where soils remain moderately moist. The species is notable for its sexual dimorphism, with male and female flowers occurring on separate plants, and female individuals producing clusters of bright berries. Biologically, Ilex opaca exhibits strong evergreen persistence and shade tolerance, allowing it to occupy understory positions within forests. Its dense branching and resilient foliage make it a structurally distinctive evergreen shrub within temperate woodland ecosystems.