Salvia is the largest genus of plants in the mint family, Lamiaceae, with approximately 900 species of shrubs, herbaceous perennials, and annuals. It is one of three genera commonly referred to as sage. When used without modifiers, sage generally refers to Salvia officinalis ("common sage"); however, it can be used with modifiers to refer to any member of the genus.

The ornamental species are commonly referred to by their scientific name Salvia. The genus is distributed throughout the world, with the center of diversity and origin appearing to be Central and South Western Asia, while nearly 500 species are native to Mexico and Central and South America. The name is derived from the Latin salvere ("to save"), referring to the long-believed healing properties of salvia.

The Latin was corrupted to 'sauja', to the French 'sauge', and to the old English 'sawge', and eventually became the modern day 'sage'. Pliny the Elder was the first to use the Latin name salvia. Salvia species include annual, biennial, or perennial herbs, along with woody based sub-shrubs.

The stems are typically angled like other members in Lamiaceae. The flowers are produced in spikes, racemes, or panicles, and generally produce a showy display with flower colors ranging from blue to red, with white and yellow less common. The calyx is normally tubular or bell shaped, without bearded throats, and divided into two parts or lips, the upper lip entire or three-toothed, the lower two-cleft.

The corollas are often claw shaped and are two-lipped with the upper lip entire or notched and spreading. The lower lip typically has three lobes with the middle lobe longest. The stamens are reduced to two short structures with anthers two-celled, the upper cell fertile, and the lower imperfect.

The flower styles are two-cleft. The fruits are smooth nutlets and many species have a mucilaginous coating.

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