Which of the following is also known as the Lily-of-the-Valley Tree?

The correct choice is associated with the common name "Lily-of-the-Valley Tree," which refers to Oxydendrum arboreum. This tree, also known as sourwood, gets its common name from the fragrant, white, pendulous flowers that resemble those of the Lily-of-the-Valley plant. The flowers bloom in summer, attracting pollinators and giving off a pleasing aroma, making it a favored choice in gardens and landscapes.

In addition, the foliage of Oxydendrum arboreum is noteworthy. In the fall, its leaves turn a vibrant red to purple, adding to the aesthetic appeal of the tree throughout the seasons. This unique combination of characteristics—fragrant flowers and beautiful autumn colors—enhances its popularity.

The other choices include species that, while significant in their own right, do not share this common name or the related characteristics. Picea pungens, or Colorado blue spruce, is valued for its striking blue needles and is widely used in landscaping but does not resemble the Lily-of-the-Valley. Pinus palustris, the longleaf pine, is essential for its ecological value but is distinct from the typical flowering characteristics of lilies. Malus sp., which encompasses various apple tree species, is