银杏Ginkgo biloba银杏科银杏属落叶乔木。原产我国甘肃、山东、江苏等地,为现存种子植物中最古老的孑遗植物,与其同纲的所有其它植物均早已灭绝,故被人们称为活化石。银杏喜光照充足、温暖湿润气候和肥沃的沙质壤土,耐寒、耐旱,为目前上海地区栽培最广泛的秋色叶树种之一。在上海地区其秋色叶通常于10月下旬至11月初开始由绿色逐渐转变为淡黄色直至金黄色,若不遇大风大雨等恶劣天气,其秋色叶一般可维持15天～20天。在园林应用中,一般将其作为行道树或孤植观赏,以分枝点较低的嫁接 Ginkgo Ginkgo biloba Ginkgo Branch Ginkgo deciduous trees. Origin Our country Gansu, Shandong, Jiangsu and other places, is the oldest relict plant in existing seed plants, with all other plants of its same class are already extinct, it is known as living fossils. Ginkgo hi enough light, warm and humid climate and fertile sandy loam, cold, drought-resistant, is currently the most widely cultivated in Shanghai one of the autumn color leafy species. In Shanghai, its autumn leaves are usually gradually changed from green to light yellow until golden brown from late October to early November. Autumn leaves usually last for 15 days to 20 days in the event of severe weather such as heavy rain. In landscape applications, it is generally seen as a street tree or solitary plant with a lower branching point of grafting