Several Common Landscape Trees in Hainan Island

Several common landscape trees in Hainan Island are arc-tailed coconut tree, betel nut tree, old sunflower, bottle coconut tree, cycad and so on.

there are five coconut trees of Palmaceae and foxtail. It is native to Cape York in the northeast of Queensland, Australia, and has been introduced and cultivated in China. Evergreen tree, the plant is tall and straight, the stem is solitary, the stem is smooth, with leaf scars, slightly like a wine bottle, and the height can reach 12-15m. The leaves are bright green, clustered at the top of the stem, pinnately divided, 2-3m long, and the leaflets are lanceolate, which are whorled on the leaf axis and shaped like a fox's tail, named after spikes, many branches, monoecious and ovoid.

Areca catechu is cultivated in India, Sri Lanka, Thailand, Malaysia and the Philippines. The trunk is unbranched, 12 ~ 15m high. Semen arecae is the seed of areca catechu in Palmae. The betel nut leaf is the leaf of Piper betle of Piperaceae. Areca nut is slightly smaller than an egg, with a fibrous skin and a seed, namely semen arecae. The endosperm is hard with grayish brown spots.

the silk sunflower (scientific name: Washingtonia filifera) is commonly known as the old sunflower, and it is also known as California mallow and Washington palm. Native to California, Arizona and Mexico in the United States. Beautiful crown, leaves as big as a fan, rapid growth, evergreen all the year round, is an important greening tree species in tropical and subtropical regions. It is suitable to be planted in the courtyard for viewing or in front of large buildings and on both sides of the road. It is an excellent greening tree species.

The trunk of the bottle coconut tree is smooth, bottle-shaped, swollen below the middle, and tapering to a neck shape near the top. The leaves are clustered at the top of the stem, and the pinnate leaves are arched and rotated, and twist laterally at the base, so that the leaf surface of the pinnate and the plane where the leaf axis is located are 45 degrees, and sometimes the edges of the pinnate and petiole are slightly red.

Cycas. Commonly known as: Cycas, alias: Bihuojiao, Fengwei Jiaojiao, Fengwei Pine, Pteridium, Latin name (:Cycas revoluta Thunb.) Cycadaceae, Cycadaceae, which is named after its high wood density, sinking in water and heavy as iron; On the other hand, it is named because it needs a lot of iron for its growth. Cycas is most famous for its flowering, which is called "Cycas flowering". Cycas is a beautiful ornamental tree species, which is widely cultivated. Its stems contain starch and are edible. Seeds are oily and rich in starch, slightly toxic, edible and medicinal, and have the effects of treating dysentery, relieving cough and stopping bleeding.