The various types of roses are by far the most popular flowering shrub for landscaping. The Rosa genus includes more than 300 species of woody flowering perennials, and there are several thousand rose types that have been cultivated within those species.
While there are native roses found on nearly every continent, most landscape types of roses are multi-generational hybrid cultivars for which the original species ancestors have long since been forgotten. When you buy a modern rose variety, it is almost always sold by a unique cultivar name rather than by a species name.
