Espèces

The botanical species of roses, which belong to the genus Rosa, are the number from 100 to 200 according to the authors and are divided into four sub-genres: Plathyrhodon, Hesperhodos, Hulthemia (sometimes considered a separate genus) and Eurosa.
The subgenus Eurosa is divided into eleven sections: Pimpinellifoliae (burnet roses), Gallic (Gallic roses) Caninae, Carolinae, Gymnocarpae, Cinnamomeae (cinnamon roses) Chinenses, Banksianae, Laevigatae, Bracteatae and Synstylae.
Only a dozen species and their derivatives taxa (varieties, forms) have been used to create the most educated, usually called "double" flowers roses or "full", with many petals. More "natural" forms are grown in gardens, it is the "Botanic Roses", the simplest form like the wild rose, and hardiness agree well with the trend of a garden "savage. "Modern rose growers seek to exploit the diversity of the genus Rosa to introduce variety into their particular genes, for example resistance to cold or certain diseases.