Eucalyptus spp. (scientific name: Eucalyptus spp.) is a collective term for plants in the Eucalyptus, Eucalyptus, and Eucalyptus genera of the Myrtle family. Most of them are evergreen trees with a wide variety of species. Eucalyptus is derived from the transliteration of French by modern Chinese scholar Wu Zonglian. "Eucalyptus" is related to "case" in ancient Chinese and is named "Eucalyptus", which means that its material can be used to make objects. Eucalyptus also has the function of treating diseases and preventing epidemics. The name "Eucalyptus" means safe but not dangerous.

Araucaria cunninghamii Mudie is a tree in the family Araucaria and genus Araucaria. It can grow up to 60-70 meters tall in its native area, with a diameter at breast height of over 1 meter. The bark is gray brown or dark gray, thick, and horizontally split; The large branches are flat or slanting, with a pointed tower shaped crown for young trees and a flat top shape for older ones. The lateral branches are densely distributed and drooping, arranged in a nearly feather like pattern. Southern fir is not cold resistant and should avoid drought. It needs sufficient sunlight in winter; Originating from the southeastern coastal areas of Oceania, it is cultivated in open fields in Guangdong, Fujian, Taiwan, Hainan, Yunnan, Guangxi and other places in China.

Araucaria cunninghamii Mudie is a tree in the family Araucaria and genus Araucaria. It can grow up to 60-70 meters tall in its native area, with a diameter at breast height of over 1 meter. The bark is gray brown or dark gray, thick, and horizontally split; The large branches are flat or slanting, with a pointed tower shaped crown for young trees and a flat top shape for older ones. The lateral branches are densely distributed and drooping, arranged in a nearly feather like pattern. Southern fir is not cold resistant and should avoid drought. It needs sufficient sunlight in winter; Originating from the southeastern coastal areas of Oceania, it is cultivated in open fields in Guangdong, Fujian, Taiwan, Hainan, Yunnan, Guangxi and other places in China.

Acacia farnesiana (L.) Wight&Arn Fabaceae is a shrub of the genus Acacia, whose stem surface is rough and appears black brown; The supporting leaves are thorny and sharp, the compound leaves are feather shaped, and the small leaves are linear and rectangular in shape; Its flowers are numerous and dense, mostly spherical in shape, with a yellow color and fragrant taste; The fruit is cylindrical in shape, while the seeds are oval in shape, mostly brown. Its flowering period is in spring, and its fruiting period is in summer and autumn. Due to its golden appearance when in full bloom, it is named Acacia.

Willow trees are trees of the willow genus in the willow family. Branches are cylindrical in shape, with a nearly circular pith; No apical buds, lateral buds usually adhere closely to the branch, and bud scales are single; Leaves alternate, sparsely opposite, usually narrow and long, often lanceolate, feather veins, serrated or entire, petiole short, with supporting leaves, often serrated; The inflorescence of the hibiscus is upright or obliquely spread, with the bracts covering the entire edge, and the pistil composed of two carpels; The capsule is split into two petals; The seeds are small and often dark brown in color. The flowering period is from February to March, and the fruiting period is from March to April. The name of willow tree comes from its head wood working method. The result of the head tree homework is to preserve the trunk for continuous use of the branches, and the pronunciation of the word "willow" is the same as that of "liu", hence the name "willow tree".

Acacia farnesiana (L.) Wight&Arn Fabaceae is a shrub of the genus Acacia, whose stem surface is rough and appears black brown; The supporting leaves are thorny and sharp, the compound leaves are feather shaped, and the small leaves are linear and rectangular in shape; Its flowers are numerous and dense, mostly spherical in shape, with a yellow color and fragrant taste; The fruit is cylindrical in shape, while the seeds are oval in shape, mostly brown. Its flowering period is in spring, and its fruiting period is in summer and autumn. Due to its golden appearance when in full bloom, it is named Acacia.

Willow trees are trees of the willow genus in the willow family. Branches are cylindrical in shape, with a nearly circular pith; No apical buds, lateral buds usually adhere closely to the branch, and bud scales are single; Leaves alternate, sparsely opposite, usually narrow and long, often lanceolate, feather veins, serrated or entire, petiole short, with supporting leaves, often serrated; The inflorescence of the hibiscus is upright or obliquely spread, with the bracts covering the entire edge, and the pistil composed of two carpels; The capsule is split into two petals; The seeds are small and often dark brown in color. The flowering period is from February to March, and the fruiting period is from March to April. The name of willow tree comes from its head wood working method. The result of the head tree homework is to preserve the trunk for continuous use of the branches, and the pronunciation of the word "willow" is the same as that of "liu", hence the name "willow tree".

Spruce is a perennial green tree that inhabits mountainous areas and river valleys at elevations of 2000 meters (6600 feet) to 3800 meters (12500 feet). The Hardiness Zones are classified as level 6 to 7, requiring sufficient sunlight, a moist environment, good drainage, and neutral to acidic soil. It can grow in poor or strong acidic soil, but cannot adapt to air pollution environments and grows slowly. In natural environments, it often accumulates into vast pure forests, resembling white clouds from afar, hence the name Spruce.

Pinaceae (scientific name: Pinaceae) is a family of pine trees in the order Pinaceae, commonly known as pine or pine trees. Although many species are called "fir" in Chinese, their general characteristic is that their leaves are shaped like needles to prevent large amounts of water from evaporating. And in some places with less hot climates, around 40 to 60 degrees north latitude (such as Europe), this type of plant is also common. There are 11 genera and approximately 220-250 species in the pine family, mainly distributed in the northern hemisphere.