Marjoram  is a somewhat cold-sensitive perennial herb or undershrub with sweet pine and citrus flavors. In some Middle Eastern countries, marjoram is synonymous with oregano, and there the names sweet marjoram and knotted marjoram are used to distinguish it from other plants of the genus Origanum. It is also called pot marjoram, although this name is also used for other cultivated species of Origanum.

Leaves are smooth, simple, petiolated, ovate to oblong-ovate, (0.5-1.5cm) long, (0.2-0.8cm) wide, with obtuse apex, entire margin, symmetrical but tapering base, and reticulate venation. The texture is extremely smooth due to the presence of numerous hairs.