A. sylvestris may refer to: * Aerisilvaea sylvestris, a plant species endemic to Tanzania * Agathaumas sylvestris, a large ceratopsid species that lived in Wyoming during the Late Cretaceous * Anemone sylvestris, a herbaceous perennial flowering plant species found in dry deciduous woodlands of Central and Western Europe * Angelica sylvestris, the wild angelica, a plant species * Anthriscus sylvestris, the cow parsley, wild chervil, wild beaked parsley or keck, a herbaceous biennial plant species * Adenodus sylvestris, a synonym for Elaeocarpus sylvestris, a tree species found in China, Japan, Korea and Vietnam