Afrostyrax lepidophyllus, commonly known as country onion, is a tropical African tree species in the family Huaceae that is widely known for its aromatic seeds that are used as a spice. The name Afrostyrax combines Afro-, referring to Africa, and styrax, a genus of aromatic resin-producing trees, while lepidophyllus derives from Greek lepis (“scale”) and phyllon (“leaf”), referring to the scaly or textured appearance of the leaves. The common English name country onion reflect the musky, sulfurous onion-like aroma of the seeds. It is native to the humid lowland rainforests of Central and West Africa, particularly in Cameroon, Equatorial Guinea, Gabon, the Republic of the Congo, and the Democratic Republic of the Congo.

Traditionally, the dried seeds of Afrostyrax lepidophyllus have been used locally as a pungent seasoning and medicinal plant, valued for their strong peppery, musky aroma and preservative qualities. Its seeds are dried and ground to produce a spice used to flavor soups, stews, sauces, and meat dishes. In some regions, the spice is used both as a flavoring and as a functional ingredient believed to aid digestion and preserve food. It is especially associated with forest-dwelling and forest-adjacent cultures of Central Africa, where it plays a role similar to that of other pungent spice seeds.

The plant contains notable bioactive compounds, particularly aframodial, an aromatic sesquiterpenoid dialdehyde that contributes strongly to its odor and flavor, as well as related sesquiterpenes and oxygenated terpenoids. Aframodial is odorous, strongly flavored, and relatively heat stable, allowing its aroma to persist during cooking; it has been studied for antimicrobial and insecticidal activity, which may help explain the plant’s traditional use in food preservation. Other volatile compounds present contribute to its pungency and may have mild digestive or antimicrobial effects, though excessive consumption is not common and toxicity is not well documented in culinary contexts.