LAVENDER CO2

Basic

Plant/History

Uses

Feedback

Safety

About the Plant

Scientific Name(s): Botanically, the genus Lavandula can be divided into 5 sub-generic groups. All the garden and common lavenders belong to the Stoechas and Spica groups. A number or rare species cultivated in Australia and New Zealand belong to the Pterostachys group. There are approximately 30 species. The sub-genus Spica includes L. angustifolia, L. latifolia and L. lanata, all collectively known as lavandin. True English lavender, L. angustifolia Mill, is the species from which the essential oil used in aromatherapy and perfumery is distilled. This species has also been known by the synonyms L. officinalis Chaix, L. vera DC, and L. spica L. The synonym L. officinalis indicates that this was the lavender specified for medicinal use. L. angustifolia is adapted to living in a dry climate and is native to the western half of the mediterranean, reaching altitudes of up to 1800 meters. It is also recognized as a separate type of lavender by the Welsh physicians of the thirteenth century who knew it as Llafant. Many garden lavenders are inter-specific hybrids between L. angustifolia and L. latifolia, and these hybrids are collectively known as 'lavandin', with the accepted nomenclature being L. x intermedia Emeric ex Boiseleur. This complex situation results in many incorrect names for lavandin.

Several Lavandula species have been used medicinally, including L. angustifolia Mill. (syn. L. officinalis Chaix. and L. spica, L. stoechas, L. dentata, L. latifolia and L. pubescens Decne.

Family: Lamiaceae (formerly Labiatae) Sub-Family: Nepetoidae, Tribe: Lavanduleae, Genus Lavandula

Common Name(s): Aspic, lavandin (usually refers to particular hybrids), lavender, spike lavender, true lavender.

Botany: Lavender plants are aromatic evergreen sub-shrubs that grow to about 3 feet high. The plants are native to the Mediterranean region. Fresh flowering tops are collected, and the essential oil is distilled or extracted by solvent extraction.1 The plant has small blue or purple flowers, sometimes white or violet. The narrow leaves are fuzzy and gray when young and turn green as they mature. Lavender is cultivated extensively for use as a perfume, potpourri and as an ornamental.

Morphology: Lavenders are herbs and shrubs (Hyptis). Young stems are often 4-angled with leaves opposite, whorled and simple, with no stipules. Flowers are bisexual, usually 2-lipped (upper lip with 2 lobes, lower lip with 3 lobes. Four stamens, in 2 sets (didynamous), with filaments partially fused to petals (epipetalous). Two partially fused carpels, each with 2 lobes, basal style with 2 lobed stigma. Fruit 4 nutlets. Calys usually persistent with 5 fused lobes or 2-lipped. Infloresence - main stem with flowers in whorls, flowers with or without stalks (infloresence a verticillate spike or raceme, flowers +/- pedicels). Often with short-stalked epidermal glands containing essential oils.

Distribution: Most species of lavender are native to the Mediterranean coastal region, but others come from islands in the Atlantic Ocean, tropical north-east Africa (Somalia) and the Indian sub-continent.

History

It is likely that the Romans or Benedictine monks introduced Lavender to England before the Norman conquest, and it was first recognized as a distinct form of lavender in the twelfth century by the Abbess Hildegard (AD 1098-1180) who lived near Bingen on the Rhine. Lavender has long found a role in folk medicine. The plant has been used as an antispasmodic, carminative, diuretic and general tonic. Extracts have been used to treat conditions ranging from acne to migraines. Although the plant has been known to increase bile flow output and flow into the intestine, its greatest value is not in the treatment of biliary conditions. Lavender has been used quite extensively as an antidiabetic agent in parts of Spain and is included in some commercial herbal antidiabetic preparations. Fresh leaves and flowers, as well as the diluted essential oil are applied to the forehead to relieve headaches and to joints to treat rheumatic pain. The vapors of steamed flowers are used as a cold remedy. Chileans drink the tea to induce or increase menstrual flow.

In herbalism, Lavender is usually administered orally in the form of an infusion, decoction and is either taken internally or diluted essential oil applied topically for relief of neuralgia. Today, lavender oil and extracts are used as pharmaceutical fragrances and in cosmetics. Spike lavender oil is often used in soaps because it is inexpensive but of lower quality than true lavender oil. Lavandin oil, lavender absolute (an extract) and spike lavender oil are used in concentrations of up to 1.2% in perfumes.1 Small amounts (0.002% to 0.004%) of the oil are used to flavor food.

Lavender's versatility is seen in its various applications as a fragrance in perfumes, bath and shower products, hair care products, toiletry soaps, detergents, typical formulations, synthetic derivatives and production.

Lavender flowers contain between 1% to 3% essential oil. Lavandin hybrids contain a higher volatile oil content, but its composition is extremely variable. The oil is a complex mixture of more than 150 compounds, the most abundant of which are linaloyl acetate (30% to 55%), linalool (20% to 35%), cineole, camphor, beta-ocimene, limonene, caproic acid, caryophyllene oxide and tannins (5% to 10%).1,7 However, the relative amounts of these compounds can vary widely between species.8,9 Perillyl alcohol, a distillate of L. angustifolia has been shown to exert anticancer effects.10 Several articles on lavender are available, discussing analysis methods,11-13 enantiomeric purity and distinctiveness, 14-16 variety deviation,17-20 essential oil quality, 21,22 GC retention indices,23 and lavender content in perfumes.

Aromatherapy: The CO₂ extract is a relative newcomer to aromatherapy, however, it has great promise in that in addition to all of the volatile elements contained in the essential oil, it has other plant constituents which increase its effectiveness, especially in topical skin aromatherapy. All Lavandula angustifolia varieties contain between 22-53% linalyl acetate, an ester, and 18-49% linalol, a monoterpene alcohol, which are compounds that has been tested to have significant sedative effects. These qualities show lavender to have high potential as a sleep aid, antidepressant and calming agent for nervous agitation. Lavender has so many uses in aromatherapy that it is practically indispensable. Many who diffuse lavender for better sleep report that they also feel they remain alert and function better the following day. Lavender also has researched anti-inflammatory and analgesic effects, which makes it good in any blend intended to reduce pain, including headaches, arthritis, sore or overworked muscles. It is an excellent remedy for minor burns and sunburn. As an anti-inflammatory, it is found in many preparations for adverse skin conditions, dermatitis, acne, etc. In massage, it can help address myriad issues such as muscle cramping, irritable bowel syndrome. It is also used in respiratory blends. It is one of the most-used essential oils in aromatherapy.

Perfumery: The CO2 extracted material is new to use in perfumery. True lavender (L.angustifolia is still unequaled as a popular, fresh-sweet, herbal-floral fragrance in lotions, colognes and as an additive to modern perfume types. It is used extensively in colognes, including Citrus based colognes and well-known lavender waters. Also can be used in fougeres, chypres, ambers and countless floral, semi-floral compositions. It blends well with labdanum, base notes of patchouli, cedarwood and vetiver; Conifers such as pine and fir, and for women especially, clary sage. If you are making perfumes based on energetic or emotional aromatherapy concepts, lavender essential oil will add a strengthening and calming/balancing effect.

Most aromatherapy information touts Lavender and Lavandin as the safest essential oils in the aromatherapy palate, and the same seems to hold true for the CO₂ extractions as well.. However, there have been instances of negative reactions recorded over the years, increasing since 1997 with the widespread use in commercial cosmetic products of both the essential oil and dried or extracted botanical. Lavandin shows no irritation or sensitisation at 5% and little or no irritation to human skin was shown (BIBRA Working Group 1994), however sensitisation has been caused in some individuals. Patch tests show a few allergies due to photosensitisatin and also pigmentation (Nakayama et al., 1976; Brando, 1986). At least one contact airborne severe allergic dermatitis through overuse by an aromatherapist is reported (Schaller and Korting, 1995). A friend and fellow aromatics products seller has been sensitized in the late 1990's.

It is extremely important to be accurately assured of the source and quality of the essential oil or CO₂ if used during pregnancy, childbirth or while lactating or breast feeding.

Lavender essential oil, CO₂ extractions and its hybids are relatively safe to use except for the sensitisation issue. Most probably the incidence of adverse effects is due to adulteration, especially with synthetic components, rather than the essential oil itself.

The information provided on these pages is not a substitute for necessary medical care, nor intended as medical advice. Always keep aromatic extracts tightly closed and in a cool, dark place, out of reach of children. Never ingest aromatic extracts. Always dilute aromatic extracts when applying topically and avoid areas around eyes or mucous membranes. If redness or irritation occurs, stop using immediately and contact your health provider if necessary.