A healthier batch of 3,020 arrived in spring 1912. (The spread of Japanese flora has not been without its problems, particularly with plants that became invasive: among them, Japanese honeysuckle, the paulownia tree and kudzu.)In 1914 and 1915, Ernest Wilson brought back more flowering cherry trees, conifers and 50 varieties of Kurume azaleas that would transform the American garden.Collectors ret