Tuesday, August 17, 2010

Lavender's species and varieties





There is a big difference between the two.
It is worth taking a moment to clarify the distinction - especially for anyone interested in using lavender in aromatherpy.

The lavenders (Lavandula) are a genus of 39 species of flowering plants in the mint family, Lamiaceae. An Old World genus, distributed from Macaronesia (Cape Verde and Canary Islands and Madeira) across Africa, the Mediterranean, South-West Asia, Arabia, Western Iran and South-East India. It is thought the genus originated in Asia but is most diversified in its western distribution.
Several varieties of lavender are used medicinally, but the most valuable is the common or 'true' lavender Lavandula angustifolia.
Apart from 'true' lavender, there are principally three other types in which are used for producing essential oils:
+ spike lavender (Lavandula latifolia),
+ lavandin (Lavandula x intermedia)
+ and stoechas lavender (Lavandula stoechas).

Understanding the Species
Lavandula angustifolia: (Commonly referred to as English lavender, true lavender, Lavandula officinalis and Lavandula vera). The name lavender comes from the Latin root lavare, which means "to wash." Lavender may have earned this name because it was frequently used in baths to help purify the body and spirit. However, this herb has also been used as a remedy for a range of ailments from insomnia and anxiety to depression and fatigue. Research has confirmed that lavender produces slight calming, soothing, and sedative effects when its scent is inhaled. It is a small plant and only a single flower grows on each stem. It reproduces by seeding. The essential oil produced from Lavandula angustifolia is called the ‘universal oil’ because it has so many applications. It is known for healing burns and all types of skin wounds; having strong antimicrobial action and other properties.

Lavandula latifolia: (Formerly Lavandula spica, is commonly referred to as spike lavender). It is a tall plant with several branches, therefore each stem carries several small flowers. It reproduces by seeding. It has excellent therapeutic properties used externally, but they are limited due to relatively high camphor content. Spike lavender is strongly antiviral; works well for treating upper respiratory conditions through inhalation; is used for muscle aches, as an antiseptic and to relieve the sting of insect bites.
Lavandin: (Commonly referred to as 'Bastard Lavender', Lavandula hybrida, Lavandula hortensis or Lavandula burnatii). It is a cross between spike lavender and Lavandula angustifolia. The name consists of two parts: Lavandula x intermedia, plus the name of the particular cultivar (a plant that’s grown from cuttings, not from seeds). It is a tall plant with two branches and grows in large clumps. Due to the fact that it is a hybrid, a crossing between fine lavender and spike lavender, it is sterile and multiplies through the taking of cuttings. It started to be cultivated in the 1950’s, and ever since, people have confused it with fine lavender. This is a mistake as it has a much stronger smell, is infinitely less subtle than fine lavender, and according to some experts cannot be used for its medicinal properties. It is used mainly in industrial cleaning products and detergents.
Lavender Stoechas: (Commonly referred to as 'French Lavender, Stickadore, Stichados, Cassidony or Arabian stoechas (Lavandula stoechas). It is not as extensively cultivated as the three former varieties. The oil has a camphorous odour, more like rosemary than lavender, which is used in perfumes and soaps. It is nevertheless useful when used in dilution for chronic sinusitis, bronchitis, and upper respiratory infections. Lavandula stoechas is not used medicinally, but mainly for landscaping.


The Difference Between Lavender & Lavandin 


Although the oil of the lavandula angustifolia is more highly prized and expensive than that of lavandin, in fact far more of the lavandin oil is produced in the world. This is due to two main reasons.
Firstly, lavandin provides a much higher oil yield due to the profuse flowering of the lavandin plants, so that even with the lower price the farmers make more money per field area if they grow lavandin rather than lavender. The lavandula angustifolia seems to produce a yield of about 0.4% to 0.7%. The lavandin oil is much higher at about 1.5%. In the South of France, for example, 130 kg of Lavandula angustifolia flowers are needed to obtain 1 litre of essential oil by the distilling process, compared to 40 kg of lavandin flowers required to obtain 1 litre of essential oil (a much bigger yield than fine lavender!).
Secondly, reason is that the demand for the lavandin oil, to be used in cheaper, high volume fragrances (laundry detergents, dishwasher soaps, etc.) is greater than that for the lavender oil which is used in higher priced, lower volume fragrances in products such as perfumes, cosmetics, essential oils, skin creams, and better quality bath products.
Far less information is available about the use of lavandin oil. The smell between Lavandula angustifolia and lavandin should be very noticeable. The chemical composition between the two is very similar, with one main distinction – the chemical called camphor.
In Lavandula angustifolia the camphor level is between ca. 0.2% and 0.6%, while lavandin contains ca. 6%-8% camphor oil. Camphor has a harsh, sharp, strongly pungent fragrance, almost reminiscent of a cold remedy and it is this effect that causes the distinctive difference between the lavender and lavandin smells.
In general though, the lavandin oil is used when fragrance is the goal, while lavandula angustifolia is chosen for healing.
More Lavender
There are a few species of WHITE LAVENDER.
White lavender is less common than the usual purple variety as it is not as resistant to disease, bad weather conditions or poor soil.
However, there are five varieties available: the tiny Lavandula angustifolia "Nana Alba" and the medium-sized "Alba"; a white form of Lavandula stoechas which grows well in a container; the greenish-white Lavandula viridis, one of the taller growing species; and finally, the hardier Lavandula x intermedia "Alba".
There is also a pale pink variety available, Lavandula angustifolia "Rosea", although some purple plants do produce the odd pink flower here and there. These paler lavenders seem to have a stronger scent than the darker purple varieties.

All these information i have been study recently and now put together.
Thought, it's a very interesting info to share.

3 comments:

  1. Thanks for sharing this information, I've been wondering what the differences were between the various types of lavender, and which I'd prefer to use in my soapmaking. Right now I'm using Lavandula Latifolia, but would like to try Lavender Angustifolia for a less medicinal scent.

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  2. Hi Michelle, we have Lavandula angustifolia x latifolia essential oil from France (with Certificate of Analysis) available for sale. A 50 mL bottle is RM80 plus postage.

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  3. We also have a range of other essential oils for sale.... see our website (www.indochinenatural.com) and contact us at: office@indochinenatural.com for prices.

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