Over 100 species of roses exist in the world. Furthermore, there are thousands of varieties, or cultivars, created by crossing species of roses. For example, hybrid tea roses, which are quite popular and widely grown, are the result of crossing tea roses and hybrid perpetual roses.
Because rose species can crossbreed, or hybridize, easily, there are hybrid roses in existence, thriving in varying climates. Some rose species are native to North America, while others are naturally found in Europe or Africa. However, individual members of each rose species can differ when comparing growth patterns, disease resistance and tolerance to the cold. The Gallica, Damask, Alba, Centifolia and Mosses are the most widely cultivated types of roses in European rose gardens.