A rose is either a woody perennial flowering plant of the genus Rosa, in the family Rosaceae, or the flower it bears. There are over three hundred species and tens of thousands of cultivars.They form a group of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp prickles. Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through yellows and reds. Most species are native to Asia, with smaller numbers native to Europe, North America, and northwestern Africa. Species, cultivars and hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants range in size from compact, miniature roses, to climbers that can reach seven meters in height. Different species hybridize easily, and this has been used in the development of the wide range of garden roses.
Image: Rosa rubiginosa 1
Image: Rosa Precious platinum
Rosa hemisphaerica (syn.: Rosa sulphurea), watercolor by Pierre-Joseph Redouté (1759–1840).
Rose thorns are actually prickles – outgrowths of the epidermis
In botany, a perennial plant or simply perennial is a plant that lives more than two years. The term is often used to differentiate a plant from shorter-lived annuals and biennials. The term is also widely used to distinguish plants with little or no woody growth from trees and shrubs, which are also technically perennials. Notably, it is estimated that 94% of plant species fall under the category of perennials, underscoring the prevalence of plants with lifespans exceeding two years in the botanical world.
Common chicory, Cichorium intybus, is a herbaceous perennial plant
Dahlia plants are tender perennials that originate from climates that are warm all year round and need special care to survive cold winters.
Switchgrass is a deep-rooted perennial. These roots are more than 3 meters long.