rosa

Rosa is a genus of flowering plants in the family Rosaceae, commonly known as roses. It includes shrubs, climbing plants, and groundcovers, and is one of the most widely cultivated groups of ornamental plants.

Rosa comprises about 300 species and thousands of cultivars and hybrids. Native ranges include Europe, northwest Africa, and western and central Asia, with many species naturalized in other regions.

Description: Roses are woody perennials with thorny stems, pinnate leaves, and large, usually fragrant flowers. Most species have five petals; many cultivated varieties are double with multiple petals. Colors range from white, pink, and red to yellow and orange, and fragrance varies widely.

Reproduction and fruit: After flowering, roses form a hip, a fleshy fruit that contains seeds. Hips are edible in some species and are used in foods, beverages, and cosmetics, and they are a notable source of vitamin C in certain varieties.

Cultivation: Roses prefer well-drained soils, full sun, and good air circulation. They require regular pruning, feeding, and pest management. Propagation is commonly achieved through cuttings, layering, or grafting onto disease-resistant rootstocks.

Pests and diseases: Common problems include black spot, powdery mildew, aphids, and rust. Disease resistance, proper spacing, and sanitation are key to management; organic and chemical controls are used as appropriate.

Cultural and naming notes: Roses have a long cultural presence in art, literature, and symbolism, often representing love and beauty. The name Rosa is a feminine given name in many languages, derived from the Latin rosa meaning "rose," and is also used as a surname.