Tarragon

Artemisia dracunculus
Tarragon
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Asterales
Family: Asteraceae
Genus: Artemisia
Species: A. dracunculus
Binomial name
Artemisia dracunculus
L.[1] not Hook.f. 1881
Synonyms[2]

Tarragon (Artemisia dracunculus) is a species of perennial herb in the sunflower family. It is widespread in the wild across much of Eurasia and North America, and is cultivated for culinary and medicinal purposes in many lands.[3][4][5][6]

One sub-species, Artemisia dracunculus var. sativa, is cultivated for use of the leaves as an aromatic culinary herb. In some other sub-species, the characteristic aroma is largely absent. The species is polymorphic.[7] Informal names for distinguishing the variations include "French tarragon" (best for culinary use), "Russian tarragon" (typically better than wild tarragon but not as good as so-called French tarragon for culinary use), and "wild tarragon" (covers various states).

Tarragon grows to 120–150 cm (47–59 in) tall, with slender branched stems. The leaves are lanceolate, 2–8 cm (0.79–3.15 in) long and 2–10 mm broad, glossy green, with an entire margin. The flowers are produced in small capitulae 2–4 mm diameter, each capitulum containing up to 40 yellow or greenish-yellow florets. French tarragon, however, seldom produces any flowers (or seeds).[8] Some tarragon plants produce seeds that are generally only sterile. Others produce viable seeds. Tarragon has rhizomatous roots and it readily reproduces from the rhizomes.


Cultivation

Dried tarragon leaves

French tarragon is the variety generally considered best for the kitchen, but is never grown from seed as the flowers are sterile; instead it is propagated by root division. It is normally purchased as a plant, and some care must be taken to ensure that true French tarragon is purchased. A perennial, it normally goes dormant in winter.[8] It likes a hot, sunny spot, without excessive watering.[8]

Russian tarragon (A. dracunculoides L.) can be grown from seed but is much weaker in flavor when compared to the French variety.[8] However, Russian tarragon is a far more hardy and vigorous plant, spreading at the roots and growing over a meter tall. This tarragon actually prefers poor soils and happily tolerates drought and neglect. It is not as strongly aromatic and flavorsome as its French cousin, but it produces many more leaves from early spring onwards that are mild and good in salads and cooked food. Russian tarragon loses what flavor it has as it ages and is widely considered useless as a culinary herb, though it is sometimes used in crafts. The young stems in early spring can be cooked as an asparagus substitute. Horticulturists recommend that Russian tarragon be grown indoors from seed and planted out in the summer. The spreading plants can be divided easily.

A better substitute for French tarragon is Spanish tarragon (Tagetes lucida), also known as Mexican mint marigold, Mexican tarragon, Texas tarragon, or winter tarragon. It is much more reminiscent of French tarragon, with a hint of anise. Although not in the same genus as the other tarragons, Spanish tarragon has a stronger flavor than Russian tarragon that does not diminish significantly with age.

Health

Tarragon (Artemisia dracunculus) essential oil in a clear glass vial

Tarragon has an aromatic property reminiscent of anise, due to the presence of estragole, a known carcinogen and teratogen in mice. The European Union investigation revealed that the danger of estragole is minimal even at 100–1,000 times the typical consumption seen in humans. Estragole concentration in fresh tarragon leaves is about 2900 mg/kg.[9]

Uses

Culinary use

Tarragon is one of the four fines herbes of French cooking, and is particularly suitable for chicken, fish and egg dishes. Tarragon is the main flavoring component of Béarnaise sauce. Fresh, lightly bruised sprigs of tarragon are steeped in vinegar to produce tarragon vinegar.

Tarragon is used to flavor a popular carbonated soft drink in the countries of Armenia, Azerbaijan, Georgia and, by extension, Russia, Ukraine and Kazakhstan. The drink, named Tarhun (Armenian pronunciation: [tɑɾˈxun] Թարխուն), is made out of sugary tarragon concentrate and colored bright green.

In Iran, tarragon is used as a side dish in sabzi khordan (fresh herbs), or in stews and in Persian style pickles, particularly 'khiar shoor'.

In Slovenia, tarragon is used in a variation of the traditional nut roll sweet cake, called potica. In Hungary a popular kind of chicken soup is flavored with tarragon.

cis-Pellitorin, an isobutyramide eliciting a pungent taste, has been isolated from the tarragon plant.[10]

Chemistry

A. dracunculus oil contained predominantly phenylpropanoids such as methyl chavicol (16.2%) and methyl eugenol (35.8%).[11] Gas chromatography/mass spectrometry analysis of the essential oil revealed the presence of trans-anethole (21.1%), α-trans-ocimene (20.6%), limonene (12.4%), α-pinene (5.1%), allo-ocimene (4.8%), methyl eugenol (2.2%), β-pinene (0.8%), α-terpinolene (0.5%), bornyl acetate (0.5%) and bicyclogermacrene (0.5%) as the main components.[12]

References

Notes

  1. ↑ Artemisia dracunculus was described in Linnaeus's Species Plantarum 2:849. 1753. "Taxon: Artemisia dracunculus L.". GRIN Taxonomy for Plants. GRIN. 2014-08-17.
  2. ↑ The Plant List Artemisia dracunculus L.
  3. ↑ Flora of North America Vol. 19, 20 and 21 Page 508 Wild tarragon, Artemisia dracunculus Linnaeus, Sp. Pl. 2: 849. 1753.
  4. ↑ Flora of China Vol. 20-21 Page 722 龙蒿 long hao Artemisia dracunculus Linnaeus, Sp. Pl. 2: 849. 1753.
  5. ↑ Flora of Pakistan
  6. ↑ Altervista Flora Italiana, Assenzio dragoncello, Artemisia dracunculus L.
  7. ↑ "Artemisia dracunculus". Missouri Botanical Garden.
  8. 1 2 3 4 McGee, R. M.; Stuckey, M. (2002). The Bountiful Container. Workman Publishing. ISBN 978-0-7611-1623-3.
  9. ↑ Zeller, A.; Rychlik, M. (2007). "Impact of estragole and other odorants on the flavour of anise and tarragon". Flavour and Fragrance Journal 22 (2): 105–113. doi:10.1002/ffj.1765.
  10. ↑ Gatfield, I. L.; Ley, J. P.; Foerstner, J.; Krammer, G.; Machinek, A. Production of cis-pellitorin and use as a flavouring. World Patent WO2004000787 A2
  11. ↑ Lopes-Lutz, D. S.; Alviano, D. S.; Alviano, C. S.; Kolodziejczyk, P. P. (2008). "Screening of chemical composition, antimicrobial and antioxidant activities of Artemisia essential oils". Phytochemistry 69 (8): 1732–1738. doi:10.1016/j.phytochem.2008.02.014. PMID 18417176.
  12. ↑ Sayyah, M.; Nadjafnia, L.; Kamalinejad, M. (2004). "Anticonvulsant activity and chemical composition of Artemisia dracunculus L. Essential oil". Journal of Ethnopharmacology 94 (2–3): 283–287. doi:10.1016/j.jep.2004.05.021. PMID 15325732.

External links

Look up tarragon in Wiktionary, the free dictionary.
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