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Gymnosperms are divided into 12 families of trees, shrubs and woody vines. [5] Sequoiadendron giganteum, the giant redwood, is the largest tree in the world, and Sequoia sempervirens, the coastal redwood, is the tallest. [6] Ginkgo trees tolerate urban pollutants well, and are often planted in and near cities. [7]
Generally, resin is collected for the following uses: wood lacquering, draught-proofing of boats and traditional medicine. When mixed with beeswax, it is used in bandages for ulcerated wounds. The bark of young trees is also used in traditional medicine, taken against rheumatism and diseases of the liver, and to stimulate appetite in cattle.
As field gum became scarce, "bush gum" was obtained by purposely cutting the bark of kauri trees and returning months later to retrieve the hardened resin. Due to the damage caused to the trees by the cutting the practice was banned in state forests in 1905. [23] Gum chips, small lumps useful for the manufacture of linoleum, were difficult to find.
While the unaffected wood of the tree is relatively light in colour, the resin dramatically increases the mass and density of the affected wood, changing its colour from a pale beige to yellow, orange, red, dark brown or black. In natural forests, only about 7 out of 100 Aquilaria trees of the same species are infected and produce aloes/agar wood.
Styrax (common names storax or snowbell [1]) is a genus of about 130 species of large shrubs or small trees in the family Styracaceae, mostly native to warm temperate to tropical regions of the Northern Hemisphere, with the majority in eastern and southeastern Asia, but also crossing the equator in South America. [2]
Ailanthus triphysa (also Ailanthus malabarica) is a medium to tall evergreen rainforest tree that is native to Asia and Australia. The wood is used for matchwood and plywood. The tree is known as halmaddi in India, where its resin, also called halmaddi, may be used in incense. Inappropriate extraction methods were resulting in trees dying, thus ...
Hymenaea courbaril, the courbaril or West Indian locust, [3] is a hardwood tree common in the Caribbean and Central and South America. As lumber it is frequently used to make furniture, flooring, and decoration. Its hard fruit pods have an edible dry pulp surrounding the seeds. Its sap, called animé, is used for incense, perfume, and varnish.
Copious flow of kino from a wound near the base of the trunk of a marri (Corymbia calophylla) Kino sap solidified inside damaged eucalyptus logKino is a botanical gum produced by various trees and other plants, particularly bloodwood species of eucalypts (Angophora, Corymbia, Eucalyptus) and Pterocarpus, in reaction to mechanical damage, [1] and which can be tapped by incisions made in the ...