Which plant is commonly known as the Daylily?

The plant commonly known as the Daylily is Hemerocallis sp. This genus consists of perennial flowering plants that are beloved in many gardens due to their attractive flowers and ability to thrive in a variety of conditions. Daylilies are known for their long-lasting blooms, which typically last just one day; however, each plant produces many scapes and flowers over the flowering season, creating a vivid show of color. Their hardiness, adaptability, and ease of care make them a popular choice among gardeners, as they can tolerate poor soil conditions and drought once established.

In contrast, the other plants listed do not share the same characteristics as Daylilies. Hosta sp. is primarily valued for its lush foliage and is primarily a shade plant, while Gaillardia x grandiflora, known as blanket flower, features daisy-like blooms but has a different growing habit and flower structure. Lantana camara is a flowering perennial or shrub that produces clusters of small, colorful flowers, adapted to different climates but not similar in growth or appearance to Daylilies. Thus, Hemerocallis sp. stands out as the correct designation for Daylilies.