Common Jasmine

Jasminum officinale, known as the common jasmine or simply jasmine, is a species of flowering plant in the olive family Oleaceae. It is native to the Caucasus and parts of Asia, also widely naturalized.
It is also known as summer jasmine, poet's jasmine, white jasmine, true jasmine or jessamine, and is particularly valued by gardeners throughout the temperate world for the intense fragrance of its flowers in summer. It is also the National flower of Pakistan.
It is found in the Caucasus, northern Iran, Afghanistan, Pakistan, the Himalayas, Tajikistan, India, Nepal and western China (Guizhou, Sichuan, Xizang (Tibet), Yunnan). The species is also widely cultivated in many places, and is reportedly naturalized in Spain, France, Italy, Portugal, Romania, Croatia, Bosnia and Herzegovina, Montenegro, Serbia, Algeria, Florida and the West Indies.
Chemical composition
It has alkaloids, coumarins, flavonoids, tannins, terpenoids, glycosides, emodine, leucoanthcyanins, steroids, anthocyanins, phlobatinins, essential oil and saponins. Jasminum officinale is so ancient in cultivation that its country of origin, though somewhere in Central Asia, is not certain. H.L. Li, The Garden Flowers of China, notes that in the third century CE, jasmines identifiable as J. officinale and J. sambac were recorded among "foreign" plants in Chinese texts, and that in ninth-century Chinese texts J. officinale was said to come from Byzantium. Its Chinese name, Yeh-hsi-ming is a version of the Persian and Arabic name.
Its entry into European gardens was most likely through the Arab-Norman culture of Sicily, but, as the garden historian John Harvey has said, "surprisingly little is known, historically or archaeologically, of the cultural life of pre-Norman Sicily". In the mid-14th century the Florentine Boccaccio in his Decameron describes a walled garden in which "the sides of the alleys were all, as it were, walled in with roses white and red and jasmine; insomuch that there was no part of the garden but one might walk there not merely in the morning but at high noon in grateful shade." Jasmine water also features in the story of Salabaetto in the Decameron. Jasminum officinale, "of the household office" where perfumes were distilled, was so thoroughly naturalized that Linnaeus thought it was native to Switzerland. As a garden plant in London it features in William Turner's Names of Herbes, 1548.
Essential oil
The essential oil of Jasminum officinale is used in aromatherapy. Jasmine absolute is known as the 'King of Oils', and its heavy, sweet scent is loved by most people. The flowers release their perfume at dusk, so flowers are picked at night and a tiny amount of oil is obtained by solvent extraction. The result is a very expensive oil, but it can be used in low concentrations so it is not that uneconomic to use it in products. The aroma of jasmine is described as calming and soothing without being soporific.
As an herbal medicine, it is used in dermatology as either an antiseptic or anti-inflammatory agent.
Jasminum officinale var. grandiflorum is a folk medicine used for the treatment of hepatitis in south of China. It has shown anti-viral activity in vitro.
The effect of an aqueous extract of fresh floral buds of Jasminum officinale var. grandiflorum Linn. has been studied on female fertility in rats. The extract produced a significant decrease in serum progesterone levels non-primary source.
Safety
This oil can cause irritation in some people if used too frequently or in high concentrations[medical citation needed]. A major component of jasmine is benzyl acetate (~25%) which is known to be absorbed through the skin and known to be an allergic sensitizer.[citation needed] Those who show allergies to spicy food, perfumes and cosmetics are most likely to react. However, the power of the scent is such that only tiny amounts are required. Jasmine is also an emmenagogue and therefore should not be used during pregnancy.