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Salvia greggii, the autumn sage, [1] is a herbaceous perennial plant native to a long, narrow area from southwest Texas, through the Chihuahuan Desert and into the Mexican state of San Luis Potosi, typically growing in rocky soils at elevations from 5,000 to 9,000 ft (1,500 to 2,700 m).
The classification of Salvia has long been based on the genus' unusual pollination and stamen structure, which was presumed to have evolved only once. More recently, a study using DNA sequencing of Salvia species has shown that different versions of this lever mechanism have evolved at least three different times within Salvia.
Salvia (/ ˈ s æ l v i ə /) [3] is the largest genus of plants in the sage family Lamiaceae, with nearly 1,000 species of shrubs, herbaceous perennials, and annuals. [4] [5] [6] Within the Lamiaceae, Salvia is part of the tribe Mentheae within the subfamily Nepetoideae. [4]
Salvia coccinea, the blood sage, [1] scarlet sage, Texas sage, or tropical sage, [2] is a herbaceous perennial in the family Lamiaceae that is widespread throughout the Southeastern United States, Mexico, Central America, the Caribbean, and northern South America (Colombia, Peru, and Brazil). [2]
Salvia splendens, the scarlet sage, [1] is a tender herbaceous perennial plant native to Brazil, growing at 2,000 to 3,000 m (6,600 to 9,800 ft) elevation where it is warm year-round and with high humidity. The wild form, rarely seen in cultivation, reaches 1.3 m (4.3 ft) tall.
Salvia leucophylla, also called San Luis sage, likewise producing showy purple flowers, is native to California and Baja California and used in xeriscaping in Southern California. Salvia pachyphylla, called giant-flowered purple sage, blue sage, etc., a shrub native to California and bordering areas, is used in xeriscaping in colder regions.
Salvia officinalis, the common sage or sage, is a perennial, evergreen subshrub, with woody stems, grayish leaves, and blue to purplish flowers. It is a member of the mint family Lamiaceae and native to the Mediterranean region , though it has been naturalized in many places throughout the world.
'Black and Blue' cultivar. Salvia guaranitica is a popular ornamental plant in mild areas. It grows in either full or three quarter sunlight, in well-drained soil. Numerous cultivars have been selected, including 'Argentine Skies' (pale blue flowers), 'Black and Blue' (very dark violet blue calyx), 'Blue Ensign' (large blue flowers), and 'Purple Splendor' (Light purple flowers).