A large genus of the Rosaceae and Rosaceae subfamily. Upright spreading or climbing shrubs, mostly covered with prickles or needles and thorns, rarely thornless. Leaves are alternate, odd-numbered pinnately compound leaves, extremely rare single leaves, leaflet margins are serrated, stipules are adnate or attached to the petiole, and stipules are rare. Flowers solitary or corymb-shaped, with sparse corymb-shaped inflorescences; calyx tube (receptacle) neck constricted, sepals 5, rarely 4, sometimes divided into pinnate shapes; petals 5, rarely 4, arranged in imbricate shape, white , yellow, pink to red; the flower disc surrounds the mouth of the calyx tube; the stamens are mostly divided into several whorls and are inserted around the flower disc; the carpels are mostly and rarely inserted in the calyx tube; achenes are inserted in the fleshy calyx tube to form a rose. fruit. Including various roses, roses, roses, costus, etc., they are widely distributed in cold temperate to subtropical regions in Asia, Europe, North Africa, and North America. There are more than 80 species in China, and they are distributed in the alpine plains of all northern and southern provinces.