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Coleus amboinicus, synonym Plectranthus amboinicus, [1] is a semi-succulent perennial plant in the family Lamiaceae [2] with a pungent oregano-like flavor and odor. Coleus amboinicus is considered to be native to parts of Africa, the Arabian Peninsula, and India, [3] although it is widely cultivated and naturalized elsewhere in the tropics where it is used as a spice and ornamental plant. [2]
The essential oil of Lippia graveolens contains 0-81% thymol, 0-48% carvacrol, 3-30% para-cymene, and 0-15% eucalyptol. The first two components give the plant a flavor similar to oregano [ 2 ] (to which it is not closely related), and the leaves are widely used as an herb in Mexico and Central America .
The base of the leaf stalks (petioles) is greatly expanded. Smyrnium olusatrum, common name alexanders (or alisander) is an edible flowering plant of the family Apiaceae (Umbelliferae), which grows on waste ground and in hedges around the Mediterranean and Atlantic coastal regions of Europe.
Suggestions abound for the modern day correlation of biblical hyssop ranging from a wall plant like moss or fern, to widely used culinary herbs like thyme, rosemary or marjoram. Another suggestion is the caper plant which is known to grow in the rocky soils of the region and along walls.
Pot marjoram or Cretan oregano has similar uses to marjoram. Hardy marjoram or French/ Italian/ Sicilian marjoram (O. × majoricum), a cross of marjoram with oregano, is much more resistant to cold, but is slightly less sweet. [16] O. × hybridum is known as showy marjoram or showy oregano.
Oregano essential oil in a clear glass vial. Oregano oil has been used in folk medicine over centuries. [17] Oregano essential oil is extracted from the leaves of the oregano plant. Although oregano or its oil may be used as a dietary supplement, there is no clinical evidence to indicate that either has any effect on human health. [17] [22]
There are three primary types of plant oil, differing both the means of extracting the relevant parts of the plant, and in the nature of the resulting oil: Vegetable fats and oils were historically extracted by putting part of the plant under pressure, squeezing out the oil. Macerated oils consist of a base oil to which parts of plants are added.
Leaves yield approximately 0.5-1% essential oil that is light yellow or brown with slightly sharp phenolic notes similar to oregano and thyme. [15] Major components of essential oils extracted from summer savory are carvacrol, thymol, γ-terpinene, and ρ-cymene, while α-terpinene, β-caryophyllene and β-bisabolene are found in smaller ...