Syringa have a strong fragrance. Flowering varies between mid spring to early summer, depending on the species. The fruit is a dry, brown capsule, splitting in two at maturity to release the two winged seeds. The genus "Syringa" was first formally described in 1753 by Carl Linnaeus and the description was published in "Species Plantarum". The genus name "Syringa" is derived from Ancient Greek word "syrinx" meaning "pipe" or "tube" and refers to the hollow branches of "S. vulgaris". The English common name "lilac" is from the French "lilac" via the Arabic ليلك ("lilak") from Persian نیلک ("nilak") meaning "bluish". Lilacs
Types of plant oils means of extracting essential oils. In this process, used, for example, to extract the onion, garlic, wintergreen and bitter almond essential oil, the plant material is macerated in warm water to release the volatile compounds in the plant. Types of plant oils Plant oils or vegetable oils are oils derived from plant sources, as opposed to animal fats or petroleum. 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 are what are most commonly called vegetable oils.