This list of basil cultivars is a comprehensive list of cultivated [[variety (biology)|varieties]] ([[cultivar]]s) of [[basil]]. They are used in a variety of ways: as culinary herbs, landscape plants, healing herbs, teas, and for worship. All true basils are [[species]] of genus [[Ocimum]]. The genus is particularly diverse, and includes [[annual plant|annuals]], non-woody [[perennial plant|perennials]] and [[shrub]]s native to [[Africa]] and other [[tropics|tropical]] and [[subtropics|subtropical]] regions of the [[Old World|Old]] and [[New World]]. Although there are an estimated 50 to 150 species of basil, most, but not all culinary basils are [[cultivar]]s of O. basilicum, or [[sweet basil]]. Some are cultivars of other basil species, and others are [[Hybrid (biology)|hybrids]]. It is particularly challenging to determine which species a basil belongs to. This is because basil cross-breeds easily, and drawing boundaries between species is particularly difficult. In fact, recent studies have led to reclassification of some portions of the genus. Basil cultivars vary in several ways. Visually, the size and shape of the leaves varies greatly, from the large lettuce-like leaves of the Mammoth basil and Lettuce leaf basil to the tiny leaves of the Dwarf bush basil. More practically, the fragrance of the basil varies due to the varying types and quantities of [[essential oil]]s contained in the plants. The most important are 1,8 [[cineol]], [[linalool]], [[citral]], methyl chavicol ([[estragole]]), [[eugenol]] and [[methyl cinnamate]], although hardly any basil contains all of these in any significant amount.

Basil cultivars

[[File:Ocimum tenuiflorum2.jpg|thumb|Holy basil]] [[Image:Basil-PWittal.JPG|thumb|Sweet basil growing in the sun]] [[Image:Thai basil flower.jpg|thumb|Late summer Thai basil flowers]] [[Image:Basil leaves.jpg|thumb|Harvested sweet basil leaves]] [[Image:Bush basil AKA manjerico.jpg|thumb|Greek Bush Basil]] {| class="wikitable" ! colspan="3" style="background-color:#efe;font-size:120%;" | Ocimum basilicum cultivars |- ! Common name !! Species and cultivars !! Description |- | [[Sweet basil]] || O. basilicum || The best known, with a strong [[clove]] scent when fresh. |- | [[Lettuce leaf basil]] || O. basilicum 'Lettuce Leaf' || Has leaves so large they are sometimes used in salads. |- | [[Mammoth basil]] || O. basilicum 'Mammoth' || Another large-leaf variety, stronger flavor than sweet Genovese. |- | [[Genovese basil]] || O. basilicum 'Genovese Gigante' || Almost as popular as sweet basil, with similar flavor. |- | [[Nufar basil]] || O. basilicum 'Nufar F1' || Variety of Genovese resistant to [[fusarium wilt]]. |- | [[Spicy globe basil]] || O. basilicum 'Spicy Globe' || Grows in a bush form, very small leaves, strong flavor. |- |[[Greek Yevani basil]] ||O. basilicum 'Greek Yevani' || Organically grown version of [[Spicy globe basil]]. |- | [[Fino verde basil]] || O. basilicum piccolo || Small, narrow leaves, sweeter, less pungent smell than larger leaved varieties. |- |[[Boxwood basil]] || O. basilicum 'Boxwood'|| Grows tightly like boxwood, very small leaves, strong flavor, great for pestos. |- | [[Purple ruffles basil]] || O. basilicum 'Purple Ruffles' || Solid purple, rich and spicy and a little more anise-like than the flavor of Genovese Basil. |- | [[Magical Michael]] || O. basilicum 'Magical Michael' || Award-winning hybrid with an uncommon degree of uniformity, and nice flavor for culinary use. |- | [[Dark opal basil]] || O. basilicum 'Purpurascens' || Award-winning variety, developed at the [[University of Connecticut]] in the 1950s. |- | [[Red rubin basil]] || O. basilicum 'Red Rubin' || Strong magenta color, similar flavor to sweet basil, also called Opal basil. |- | [[Osmin purple basil]] || O. basilicum 'Osmin Purple' || Dark shiny purple with a jagged edge on the leaves, smaller leaves than red rubin. |- | [[Cuban basil]] || O. basilicum || Similar to [[sweet basil]], with smaller leaves and stronger flavor, grown from cuttings. |- | [[Thai Basil|Thai basil]] || O. basilicum var. thyrsiflorum|| Called Ho-ra-pa (ต้นโหระพา) in [[Thai language|Thai]], gets its scent of licorice from [[estragole]]. |- | 'Siam Queen' || O. basilicum var. thyrsiflorum 'Siam Queen' || A named cultivar of Thai Basil |- | [[Cinnamon basil]] || O. basilicum 'Cinnamon' || Also called Mexican spice basil, with a strong scent of [[cinnamate]], the same chemical as in cinnamon. Has purple flowers. |- | [[Licorice basil]] || O. basilicum 'Licorice'|| Also known as Anise basil or Persian basil, silvery leaves, spicy licorice smell comes from the same chemical as in [[anise]], [[anethole]]. Thai basil is also sometimes called Licorice basil. |- | [[Mrs. Burns lemon basil]] || O. basilicum var. citriodora 'Mrs. Burns' || Clean, aromatic lemon scent, similar to lemon basil. |- ! colspan="3" style="background-color:#efe;font-size:120%;" |Ocimum americanum (formerly known as O. canum) cultivars |- ! Common name !! Species and cultivars !! Description |- | [[Lemon basil]] || O. americanum || Contains [[citral]] and [[limonene]], therefore actually does smell very lemony, tastes sweeter. Originally, and sometimes still, called "hoary basil". Popular in Indonesia, where it is known as 'kemangi'. Also sometimes 'Indonesian basil'. |- | [[Lime basil]] || O. americanum || Similar to lemon basil. |- ! colspan="3" style="background-color:#efe;font-size:120%;" |Ocimum ×citriodorum cultivars |- ! Common name !! Species and cultivars !! Description |- | [[Greek column basil]] || O. ×citriodorum 'Lesbos' || Columnar basil, can only be propagated from cuttings. |- | [[Thai lemon basil]] || O. ×citriodorum || Called mangluk ([[:th:%E0%B9%81%E0%B8%A1%E0%B8%87%E0%B8%A5%E0%B8%B1%E0%B8%81|แมงลัก]]) in [[Thai (language)|Thai]]. It has a citrus odor, with a distinct [[Melissa officinalis|Lemon-balm]]-like flavor |- ! colspan="3" style="background-color:#efe;font-size:120%;" |Other Species and Hybrids |- ! Common name !! Species and cultivars !! Description |- | [[Tulsi|Holy basil]] || O. sanctum
(alt. O. tenuiflorum) || Also sacred basil, Tulsi (तुलसी) in [[Hindi language|Hindi]], a [[Perennial plant|perennial]] breed from [[India]], used in [[Ayurveda]], for worship, and in Thai cooking. |- | [[Ocimum gratissimum|Clove Basil]] || O. gratissimum |- | [[Greek bush basil]] (Greek Spicy Globe Basil)|| O. minimum
(alt. O. basilicum var. minimum)|| Forms a nearly perfectly round globe, with thin, tiny leaves and a delicious scent. Despite its name, the variety probably originated in Chile. |- | [[Dwarf bush basil]] || O. minimum || Unusually small bush variety, similar to Greek bush basil. |- | [[African Blue basil]] || O. kilimandscharicum × basilicum || A sterile perennial hybrid, with purple coloration on its leaves and containing a strong portion of actual [[camphor]] in its scent. |- | Spice basil || O. basilicum × americanum || A fruity/musky-scented cultivar sometimes sold as Holy Basil |- | [[Sweet Dani basil]] || O. basilicum × americanum || A vigorous, large-leaved green basil with a strong, fresh lemon scent, a 1998 All-American Selection. |}