ハマナス
"Rosa rugosa" is naturalized in many parts of Europe, and it is considered an invasive species in some habitats, particularly in seashores of Northern Europe. To further understand the invasive process, it was first introduced into England from Japan in 1796, and then in Germany in 1845. This was the first presence of the flower within the European continent. In 1875, "Rosa rugosa" was found in Denmark and then in Sweden in 1918. By 2001, the flower species had become well established within 61 European countries. Although, it is native within China, it has been labeled as an endangered species due to a noticeable high decline in population rates of the flower. The species was able to spread due to birds and animals that eat the berries from the bush and people buying the rose and taking it with them overseas. It can outcompete native flora, thereby threatening biological diversity. On Sylt, an island in the north of Germany, it is sufficiently abundant to have become known as the "Sylt rose".