Roses are perhaps the most complex flowers we can see. Its flower shape, color and fragrance are ever-changing, ranging from elegant roses to curly garden roses and gems-dazzling modern hybrid roses. Today, there are more than 200 kinds of roses growing all over the world. As people constantly try to get more beautiful, fragrant, longer-blooming roses through hybridization, the common horticultural and commercial rose varieties have been updated at the rate of every five years. It is very difficult to identify a kind of rose, and even the opinions of experts often vary greatly, because the species of roses are very easy to change and cross easily; hybrid roses can not only be selected by manual control, but also form naturally in large numbers.
The main content of this text is that natural attributes and man-made requirements lead to the complexity of rose varieties.