Oregano is a perennial herb, growing from 20–80 cm tall. It is sometimes called wild marjoram, and its close relative, O. majorana, is known as sweet marjoram. Oregano is a culinary herb, used for the flavor of its leaves, which can be more flavorful when dried than fresh. It has an aromatic, warm, and slightly bitter taste, which can vary in intensity. Oregano's most prominent modern use is as the staple herb of Italian-American cuisine.