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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.
A number of pressed vegetable oils are either not edible, or not used as an edible oil. The fruit of the amur cork tree Castor beans are the source of castor oil. Astrocaryum vulgare (Tucumã) oil. Amur cork tree fruit oil, pressed from the fruit of the Phellodendron amurense. It has been studied for insecticidal use. [184] [185]
Cedar oil, also known as cedarwood oil, is an essential oil derived from various types of conifers, most in the pine or cypress botanical families. It is produced from the foliage, and sometimes the wood, roots, and stumps left after logging of trees for timber.
Melaleuca quinquenervia, commonly known as the broad-leaved paperbark, paper bark tea tree, punk tree or niaouli, is a small- to medium-sized tree of the myrtle family, Myrtaceae. It grows as a spreading tree up to 20 m (70 ft) tall, with its trunk covered by a white, beige and grey thick papery bark.
Tea tree oil, also known as melaleuca oil, is an essential oil with a fresh, camphoraceous odour and a colour that ranges from pale yellow to nearly colourless and clear. [ 1 ] [ 2 ] It is derived from the leaves of the tea tree, Melaleuca alternifolia , native to southeast Queensland and the northeast coast of New South Wales , Australia.
Although sandalwood trees in India, Pakistan, and Nepal are government-owned and their harvest is controlled, many trees are illegally cut down. Sandalwood oil prices had risen to $3000 per liter by 2017. [12] S. ellipticum, S. freycinetianum, and S. paniculatum, the Hawaiian sandalwood (ʻiliahi), were also used and considered high quality.
Vernicia fordii (usually known as the tung tree (Chinese: 桐, tóng) and also as the tung-oil or tungoil tree , the kalo nut tree, and the China wood-oil tree) is a species of flowering plant in the spurge family Euphorbiaceae. [2] [3] It is native to southern China, Myanmar, and northern Vietnam. [4]
Balsam is the resinous exudate (or sap) which forms on certain kinds of trees and shrubs. Balsam (from Latin balsamum "gum of the balsam tree," ultimately from a Semitic source such as Hebrew: בֹּשֶׂם, romanized: bośem, lit. 'spice, perfume') owes its name to the biblical Balm of Gilead.