From VOA learning English, this is the agriculture report. Most kinds of rose plants come from Asia. But roses are also native to other areas including northwest Africa, Europe and the United States. In 1986, the U.S. Congress chose the rose as the America's national flower. Technically, Congress and President Ronald Reagan declared that the national floral emblem. ________________________ 这里是美国之音慢速英语农业报道. 玫瑰的多数品种源自亚洲,但包括非洲西北部、欧洲和美国的其他地区也有本土玫瑰. 1986年,美国国会选择了玫瑰作为国花.严格意义上讲,国会和里根总统只是宣布它为"国家花卉象征."_______________________