Sage is an herb from an evergreen shrub. Its long, grayish-green leaves take on a velvety, cotton-like texture when rubbed. Sage has a fragrant aroma and an astringent but warm flavor.Part of the mint family, sage grows into a bushy plant up to two-feet tall and two-feet wide. It has purple, white, or pink flowers and oblong, gray-green leaves that are covered with a fine fuzz. The leaves have a savory, earthy flavor that is especially popular for use with meat and poultry dishes.