Which plant is known for its vibrant yellow and orange flowers that are often used in gardens?

Tagetes, commonly known as marigold, is celebrated for its vibrant yellow and orange flowers. These blooms are particularly popular in gardens due to their bright colors, which can enhance the visual appeal of any landscape. Marigolds are not only aesthetically pleasing but also hold functional benefits; they are often used in companion planting as they can deter pests and attract beneficial insects. Their ability to bloom continuously throughout the growing season makes them a favorite among gardeners looking to add lively color and extended seasonal interest to their gardens.

In contrast, while sunflowers can also produce yellow blooms, their overall appearance and growth habit differ significantly. Roses, with their wide range of colors, primarily emphasize pinks and reds rather than the bright yellow and orange focus of marigolds. Lilies provide beautiful flowers but are more commonly associated with white, pink, and orange hues, not the characteristic vibrant yellows and oranges of Tagetes. Thus, Tagetes stands out for its specific and bright floral display, making it the correct answer in this context.