Citrus taxonomy
All of these hybrids have in turn been bred back with their parent stocks or with other pure or hybrid citrus to form a broad array of fruits. Naming of these is inconsistent, with some bearing a variant of the name of one of the parents or simply another citrus with superficially-similar fruit, a distinct name, or a portmanteau of ancestral species. The Ponderosa lemon ("Citrus limon" × "medica") and Florentine citron ("Citrus x limonimedica") are both true lemon/citron hybrids, the Bergamot orange is a sweet orange/lemon hybrid and the Oroblanco is a grapefruit/pomelo mix, while tangelos are tangerine (mandarin)/pomelo or mandarin/grapefruit hybrids, orangelos result from grapefruit backcrossed with sweet orange, and a sweet orange backcrossed with a tangerine gives the tangor. One lumia, a member of the sweet lemons, is the product of crossing a lemon with a pomelo/citron hybrid, though another lumia variety, the Pomme d'Adam, is a micrantha/citron cross, like the Key lime. The most common and commercially popular 'limes', the Persian limes, are Key lime/lemon hybrids that combine the genetic lineages of four ancestral citrus species: mandarin, pomelo, citron and micrantha.
Saint Clement's (cocktail)
The Saint Clement's is a non-alcoholic cocktail. Though the ingredients may vary, it consists of orange juice mixed with bitter lemon, usually in equal proportions; the name of the drink refers to the English nursery rhyme Oranges and Lemons. The drink is therefore named (indirectly) after either St Clement Eastcheap or St Clement Danes, both churches in London. The traditional recipe calls for equal parts orange juice and lemon juice served over ice in a highball glass. There are many variations, in which the lemon juice is replaced with a sweeter drink (like lemonade), or even a carbonated citrus-flavored soft drink (like Sprite, 7-Up, or Fanta Lemon).