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据美国植物园协会最近统计:美国现有植物园和树木园共250处,算是世界上植物园最多的国家。比较著名的有纽约植物园、华盛顿树木园、阿诺德树木园、密苏里植物园,种植面积都在200英亩以上,收集的植物种类在数千种至万种以上。这些植物园和树木园内大都设有农业研究中心、大学生生物系、温室或人工气候室,有收藏丰富的图书馆和植物标本室,有园艺室、树木园、引种试验站、自然保护区,以及装备现代化的生理、生化实验室,经常开展各种植物基础理论研究和新技术试验研究。
According to the recent statistics of the American Botanic Gardens Association, the total number of botanic and arboreal gardens in the United States is 250, making it the country with the largest botanical garden in the world. More famous are the New York Botanical Garden, Washington Arboretum, Arnold Arboretum, Missouri Botanic Garden, planted in more than 200 acres, the collection of plant species in thousands to more than 10,000 species. Most of these arboretums and arboretums have agricultural research centers, undergraduates’ biological systems, greenhouses or artificial climatic chambers, rich libraries and herbaria, horticultural rooms, arboretums, introduction test stations, nature reserves, and Equipped with modern physiology, biochemistry laboratory, often carry out a variety of basic plant theory and new technology research.