|Rosemary in flower|
Rosmarinus officinalis, commonly known as rosemary, is a woody, perennial herb with fragrant, evergreen, needle-like leaves and white, pink, purple, or blue flowers, native to the Mediterranean region.
It is a member of the mint family Lamiaceae, which includes many other herbs. The name "rosemary" derives from the Latin for "dew" (ros) and "sea" (marinus), or "dew of the sea". The plant is also sometimes called anthos, from the ancient Greek word ἄνθος, meaning "flower". Rosemary has a fibrous root system.
Rosmarinus officinalis is one of 2–4 species in the genus Rosmarinus. The other species most often recognized is the closely related, Rosmarinus eriocalyx, of the Maghreb of Africa and Iberia. The genus was named by the 18th-century naturalist and founding taxonomist Carl Linnaeus.
Rosemary is an aromatic evergreen shrub that has leaves similar to hemlock needles. The leaves are used as a flavoring in foods such as stuffings and roast lamb, pork, chicken and turkey. It is native to the Mediterranean and Asia, but is reasonably hardy in cool climates. It can withstand droughts, surviving a severe lack of water for lengthy periods. Forms range from upright to trailing; the upright forms can reach 1.5 m (5 ft) tall, rarely 2 m (6 ft 7 in). The leaves are evergreen, 2–4 cm (0.8–1.6 in) long and 2–5 mm broad, green above, and white below, with dense, short, woolly hair. The plant flowers in spring and summer in temperate climates, but the plants can be in constant bloom in warm climates; flowers are white, pink, purple or deep blue. Rosemary also has a tendency to flower outside its normal flowering season; it has been known to flower as late as early December, and as early as mid-February.
According to legend, it was draped around the Greek goddess Aphrodite when she rose from the sea, born of Uranus's semen. The Virgin Mary is said to have spread her blue cloak over a white-blossomed rosemary bush when she was resting, and the flowers turned blue. The shrub then became known as the "Rose of Mary".
Since it is attractive and drought-tolerant, rosemary is used as an ornamental plant in gardens and for xeriscape landscaping, especially in regions of Mediterranean climate. It is considered easy to grow and pest-resistant. Rosemary can grow quite large and retain attractiveness for many years, can be pruned into formal shapes and low hedges, and has been used for topiary. It is easily grown in pots. The groundcover cultivars spread widely, with a dense and durable texture.
Rosemary grows on friable loam soil with good drainage in an open, sunny position. It will not withstand waterlogging and some varieties are susceptible to frost. It grows best in neutral to alkaline conditions (pH 7–7.8) with average fertility. It can be propagated from an existing plant by clipping a shoot (from a soft new growth) 10–15 cm (4–6 in) long, stripping a few leaves from the bottom, and planting it directly into soil.
Numerous cultivars have been selected for garden use. The following are frequently sold:
- 'Albus' – white flowers
- 'Arp' – leaves light green, lemon-scented
- 'Aureus' – leaves speckled yellow
- 'Benenden Blue' – leaves narrow, dark green
- 'Blue Boy' – dwarf, small leaves
- 'Blue Rain' – pink flowers
- 'Golden Rain' – leaves green, with yellow streaks
- 'Gold Dust' -dark green leaves, with golden streaks but stronger than 'Golden Rain'
- 'Haifa' – low and small, white flowers
- 'Irene' – low and lax, trailing, intense blue flowers
- 'Lockwood de Forest' – procumbent selection from 'Tuscan Blue'
- 'Ken Taylor' – shrubby
- 'Majorica Pink' – pink flowers
- 'Miss Jessop's Upright' – distinctive tall fastigiate form, with wider leaves.
- 'Pinkie' – pink flowers
- 'Prostratus' – lower groundcover
- 'Pyramidalis' (or 'Erectus') – fastigate form, pale blue flowers
- 'Remembrance' (or 'Gallipoli') – taken from the Gallipoli Peninsula
- 'Roseus' – pink flowers
- 'Salem' – pale blue flowers, cold-hardy similar to 'Arp'
- 'Severn Sea' – spreading, low-growing, with arching branches, flowers deep violet
- 'Sudbury Blue' – blue flowers
- 'Tuscan Blue' – traditional robust upright form
- 'Wilma's Gold' – yellow leaves
Fresh or dried leaves are used in traditional Italian cuisine. They have a bitter, astringent taste and a characteristic aroma which complements many cooked foods. Herbal tea can be made from the leaves. When roasted with meats or vegetables, the leaves impart a mustard-like aroma with an additional fragrance of charred wood compatible with barbecued foods.
In amounts typically used to flavor foods, such as one teaspoon (1 gram), rosemary provides no nutritional value. Rosemary extract has been shown to improve the shelf life and heat stability of omega 3-rich oils which are prone to rancidity.
Rosemary oil is used for purposes of fragrant bodily perfumes or to emit an aroma into a room. It is also burnt as incense, and used in shampoos and cleaning products.
Phytochemicals and traditional medicine
In traditional medicine of India, extracts and essential oil from flowers and leaves are used to treat a variety of disorders. Rosemary essential oil contains 10-20% camphor, though the chemical composition can vary greatly between different samples.
Folklore and customs
In the Middle Ages, rosemary was associated with wedding ceremonies. The bride would wear a rosemary headpiece and the groom and wedding guests would all wear a sprig of rosemary. From this association with weddings, rosemary was thought to be a love charm.
In myths, rosemary has a reputation for improving memory and has been used as a symbol for remembrance during war commemorations and funerals in Europe and Australia. Mourners would throw it into graves as a symbol of remembrance for the dead. In Shakespeare's Hamlet, Ophelia says, "There's rosemary, that's for remembrance." (Hamlet, iv. 5.) In Australia, sprigs of rosemary are worn on ANZAC Day and sometimes Remembrance Day to signify remembrance; the herb grows wild on the Gallipoli Peninsula.
Hungary water was first prepared for the Queen of Hungary Elisabeth of Poland to " ... renovate vitality of paralyzed limbs ... " and to treat gout. It was used externally and prepared by mixing fresh rosemary tops into spirits of wine. Don Quixote (Part One, Chapter XVII) mixes it in his recipe of the miraculous balm of Fierabras.
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It should be emphasized that there have been considerable variations in the chemical composition of essential oils obtained from rosemary
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