Lemongrass (Cymbopogon citratus) اذخر

Cymbopogon, better known as lemongrass (UK: /ˈlɛmənˌɡrɑːs/; US: /ˈlɛmənˌɡræs/) is a genus of Asian, African, Australian, and tropical island plants in the grass family.

Some species (particularly Cymbopogon citratus), are commonly cultivated as culinary and medicinal herbs because of their scent, resembling that of lemons (Citrus limon). Common names include lemon grass, lemongrass, barbed wire grass, silky heads, citronella grass, cha de Dartigalongue, fever grass, tanglad, hierba Luisa, or gavati chaha, amongst many others.

Lemongrass is widely used as a culinary herb in Asian cuisine and also as medicinal herb in India. It has a subtle citrus flavor and can be dried and powdered, or used fresh. It is commonly used in teas, soups, and curries. It is also suitable for use with poultry, fish, beef, and seafood. It is often used as a tea in African countries such as Togo and the Democratic Republic of the Congo and Latin American countries such as Mexico. Lemongrass oil is used as a pesticide and a preservative. Research shows that lemongrass oil has antifungal properties. Despite its ability to repel some insects, such as mosquitoes, its oil is commonly used as a "lure" to attract honey bees. "Lemongrass works conveniently as well as the pheromone created by the honeybee's Nasonov gland, also known as attractant pheromones. Because of this, lemongrass oil can be used as a lure when trapping swarms or attempting to draw the attention of hived bees.

C. citratus from the Philippines, where it is locally known as tanglad
Citronella grass (Cymbopogon nardus and Cymbopogon winterianus) grow to about 2 m (6.6 ft) and have magenta-colored base stems. These species are used for the production of citronella oil, which is used in soaps, as an insect repellent (especially mosquitoes) in insect sprays and candles, and in aromatherapy, which is famous in Bintan Island, Indonesia, and the Philippines. Therefore, its origin is assumed to be Indonesia. The principal chemical constituents of citronella, geraniol and citronellol, are antiseptics, hence their use in household disinfectants and soaps. Besides oil production, citronella grass is also used for culinary purposes, as a flavoring.

Citronella is usually planted in home gardens to ward off insects such as whitefly adults. Its cultivation enables growing some vegetables (e.g. tomatoes and broccoli) without applying pesticides. Intercropping should include physical barriers, for citronella roots can take over the field.

Lemongrass oil, used as a pesticide and preservative, is put on the ancient palm-leaf manuscripts found in India as a preservative. It is used at the Oriental Research Institute Mysore, the French Institute of Pondicherry, the Association for the Preservation of the Saint Thomas Christian Heritage in Kerala, and many other manuscript collections in India. The oil also injects natural fluidity into the brittle palm leaves, and the hydrophobic nature of the oil keeps the manuscripts dry so the text is not lost to decay due to humidity.

East Indian lemongrass (Cymbopogon flexuosus), also called Cochin grass or Malabar grass (Malayalam: (inchippullu), is native to Cambodia, Vietnam, India, Sri Lanka, Burma, and Thailand, while West Indian lemongrass (Cymbopogon citratus) is native to South Asia and maritime Southeast Asia. It is known as serai in Malaysia and Brunei, serai or sereh in Indonesia, and salai or tanglad in the Philippines. While both can be used interchangeably, C. citratus is more suitable for cooking. In India, C. citratus is used both as a medical herb and in perfumes. C. citratus is consumed as a tea for anxiety in Brazilian folk medicine, but a study in humans found no effect.The tea caused a recurrence of contact dermatitis in one case.

Lemongrass is also known as gavati chaha (गवती चहा) in the Marathi language (gavat = grass; chaha = tea), and is used as an addition to tea, and in preparations such as kadha, which is a traditional herbal 'soup' used against coughs, colds, etc. It has medicinal properties and is used extensively in Ayurvedic medicine. It is supposed to help with relieving cough and nasal congestion.

Lemon grass is hot in the second degree and dry in the first degree. It is a light substance that opens clogs and the veins orifices. It increases urine and menstruation-flow, dissolves the stones and the hard tumors in the stomach, liver and kidneys, either as a drink or as a bandage. The stems of Izkher will strengthen the column of the teeth and the stomach, calm nausea and constipate the stomach.

Lemon grass is a wild grass that grows in deserts; it is totally managed by Allah & remains untouched by human's cultivation & irrigation. It is translated as lemon grass in English, but lemon grass's fragrant smell & bitter taste is much stronger than the ordinary lemon grass.
You can find dried Lemon grass with Bedouins; they sell it at Masjid-e-Quba'a & Jabal Uhud.