Plant variety refers to the different types of plants within a species that exhibit distinct characteristics. These variations can include differences in size, color, shape, and growth habits. For example, within the species of Rosa (roses), there are numerous varieties that produce flowers in various colors and sizes, each with unique traits. Plant varieties are important for agriculture and horticulture as they can be bred for specific traits such as disease resistance, yield, or climate adaptability. This diversity helps ensure food security and allows gardeners to choose plants that best suit their growing conditions and aesthetic preferences.